I just don't get it.?

You give your life meaning by arbitrarily determining what to you makes life worth living. It's mentally stimulating for some of us to ponder the beginning/end versus infinity at both "ends". But the fact is we'll all live and die without learning much of anything compared to what's out there to be learned. We just accept it and make the most of it if we choose to. There are other choices one could make and many do make as well. But all you need to know is that there's not much to "get". Just define your own meaning and then believe me, it'll all be over sooner than you think - just like when you go to sleep at the end of a day!

Let me quote a little bit from this book (below), written by a renowned scientist, to show some of the history that led to the Big Bang theory being understood:

It was astrophysicist Fred Hoyle who supported the 'steady state' theory in the early 1950s, who coined the term 'big bang' as a term of derision. He did not actually believe this theory to be sound! But eventually, the force of evidence persuaded him to abandon 'continuous creation'. He was never entirely happy with the idea that the universe actually began. He, and all scientists, know that there was no sound - no bang - it was an almost imperceptible event with an intensely condensed atom that just suddenly began to expand.

"The idea of an expanding universe began with Einstein's general relativity theory in 1915 but the elephant in the room was deliberately ignored until Aleksandr Friedmann in 1922 and Georges Lemaitre in 1927 independently found solutions to Einstein's equations that described evolutionary as opposed to static models of the universe. This implied a beginning which could be represented mathematically as a 'singularity' in Einstein's equations. (A singularity is a point where some physical quantity becomes infinite - in this case the density and temperature of the universe, implying a 'hot big bang' beginning.)...

"Even before Friedmann and Lemaitre published their ideas, the foundations were being laid for a spectacular experimental demonstration of cosmic expansion. During 1908-1912 Henrietta Leavitt, one of America's first women astronomers, found that within a given stellar 'cloud', certain stars (called cepheid variables) fluctuated periodically in brightness in a rather special way - those with greater intrinsic luminosity (light output) also had longer periodicities. The relationship was so precise that the periodicity could be used as a measure of the intrinsic luminosity... [which enabled distances to be measured]... Astronomers had found a tape-measure to the stars.

"The next actor in the drama was Edwin Hubble... who in 1929 first realized that the red shift of some cepheid variable stars was directly related to their distance from us. Not only were the galaxies containing these stars moving away from earth, but the more distant galaxies were receding faster... Astronomers found themselves in an expanding universe and modern cosmology was born!...

"From Einstein in 1915 to Penzias and Wilson in 1963 is less than fifty years, but this period saw a revolution in man's perception of the cosmos. Scientists were at last convinced that the universe had a beginning, just as the book of Genesis had always said."

Now, if you could follow the partial quotes I've made from that author's book, then you will find the rest of it gives you the explanations you require. This scientist explains things beautifully, and he is also a Christian. He deals with particles in various parts of his book. But really, the subject is too vast to do justice to here! You really need to read the book!

How do we even know life exists? EVERYTHING we've ever seen, is out of two small spheres on our head. Everything. We only see out of two little balls. We could see in 2D for wall we know. The surface of our eye is so thin and fragile, and that' all we know. If we were to physically leave our bodies, would life still exist? Would things still be there? If I left my body, would that tree in the feild still be there? Everything we've ever known is out of those two spheres. I then think it's ok, it's just how life is. Well why is that. Where does life end and why is it here. I just don't get it and am freaking out. I don't feel comfortable at all

No The universe does not have to have a beginning.

Frankly the jury is still out on this one.

Check this bit of research http://phys.org/news/2015-02-big-quantum-equation-...

It's all up in the air right now but we'll probably find an answer one day.

Does the universe have to have a beginning?

- Yes.

I don't see why we're concerning of how our universe was created.

- Fundies need an excuse to be stupid, we just try and explain things.

Why are we even here?

- Why not?

At Genesis 1:1 the bible tells us a beautifully simple truth "In the beginning God created the heavens and the earth." From this we can see that the universe did have a beginning.

The question of the meaning of life may be asked in many ways, such as Why are we here? or Does my life have a purpose? The Bible shows that our purpose in life is to build a friendship with God. Consider some of these fundamental truths that the Bible reveals.

God is our Creator. The Bible says: “It is [God] that has made us, and not we ourselves.”—Psalm 100:3; Revelation 4:11.

God has a purpose for everything he creates, including us.—Isaiah 45:18.

God created us with a “spiritual need,” which includes the desire to find meaning in life. (Matthew 5:3) He wants us to satisfy that desire.—Psalm 145:16.

We fill our spiritual need by building a friendship with God. Although the idea of being God’s friend might seem far-fetched to some, the Bible gives us this encouragement: “Draw close to God, and he will draw close to you.”—James 4:8; 2:23.

To become God’s friend, we must live in harmony with his purpose for us. The Bible states this purpose at Ecclesiastes 12:13: “Have reverence for God, and obey his commands, because this is all that we were created for.”—Good News Translation.

In the future, we can experience in full God’s original purpose for us when he eliminates suffering and grants everlasting life to his friends, those who worship him.—Psalm 37:10, 11.

The universe may have had a beginning, but existence did not.

'What's the point of this meaningless game?"

'Points" (ie purpose and meaning) are man made concepts. We are here, make of it what you will...

As a creature and a part of nature also universe, we cannot live eternally. As scientist why this universe are not forever. They know about it. :)

Everything has a beginning and an ending.

If you take a class on thermodynamics and read and study the Bible, you may start to get it.