how much time is too much? conflicted.?

I am torn over so many concepts of my identity right now... Mostly to do with how I interact with the world...

I have always been a people person; I need to help others, and I cannot spend long amounts of time on my own, simply because that is how I am. So when it comes to a relationship and I'm with someone I truly care about, all I want to do is spend time with that special person.

I am with someone who is truly special to me in so many ways than I thought possible. He makes me believe in love, and in myself at the same time. I have the childish reactions of a teenager, thinking we'll be together forever, and I have had many moments where he'll say or do something, and I'll get this memory/flashback of the future, of him looking at me while holding a bundle, of him in a tux giving me a silly look as I walk towards him. We've only been dating for 4 months now (I've been in a 3 year relationship among others before, so I'm aware of how honeymoon-stage this is, we haven't even had a real fight yet), and I'm scared why I feel this way. I don't know how much of it is my biological clock ticking and how much of it is real. I did so much to test this man, to show him the ugly side of my past, but he's come through it all smiling and still treating me no differently. But I'm afraid that my basic personality/nature will push him away. It's always been my experience that if you hold too tightly to a man, they AWAYS push away, and it ends up wrecking the relationship.

I can't help it though. Why is it so wrong for me to want to spend a lot of time with someone so special? I do understand the need for space, and my own need for space, and we do things without each other all the time. We each have lives, and we fill them out. But when we do see each other, it's only for a few hours at a time, and it never feels like enough.

Balance: I also wonder, why the heck do I feel this way, I shouldn't feel this way for a young adult in the way the world is. Today's world is all about holding distance and playing games and being fully independent. But does wanting time with him make me a needy/desperate person? I don't need him to be happy, but it sure does contribute to it.

Looking for a lot of opinions from guys and sympathetic situations from girls.

Just a few interesting tidbits:

*He let me say "i love you" first, like i asked him to let me do.

*He was the first one to say "we're so perfect for each other"

*I told him about these images after much protesting; he just smiled and said "see, that didn't jynx it".

*Whenever he wants to reassure/comfort me, his favorite thing to do is roll on top of me and whisper in my ear "I'm never letting you go".

*By now, he is annoyed that I keep begging him to spend time with me, and he's admitted it. I want to figure out how to change that, or how to feel less like begging him. I feel like the only way I'll be able to do it is bury my head in the sand for a few days.