I get these horrible happy bursts it's scary???!!?

It's odd. I keep having these extreme bursts of happiness where I could simply just cry. My boyfriend bought me a pen today and I was very overly happy about it. This seems silly that I am talking about happiness like this but it's honestly a random bottom of the stomach happy feeling where I just want to scream and run around in happiness. It can just happen for no reason. Just sitting down and then start thinking how wonderful my life is and how happy I am and how much I love the world and the people in it.Extreme to the point of almost tears.

The oddest thing is, things aren't going well for me. I'm currently pretty much enemies with an old good friend, my uncle just died and I'm now finding myself buying the will for my father who is also having a rough time people are worried about. My mother has become disabled in the past year and my brother is currently under strong anti-depressents. It doesn't seem to me like I should be happy? Yet I still find myself singing and just being like this.

It is rather frightening for me actually in a way. I was wondering if this is abnormal and I should see someone. It sounds extreme but people have been telling me I'm weird as I guess at times I say strange stupid things and laugh too much e.t.c

I'm naturally very energetic when in the outdoors and find that I have to force myself to go to bed as I never want to sleep. I have had this problem since a child, once not going to sleep for 3 days just because I wasn't tired and had to be forced.

I know it's not a hyperactivity problem however, as I am quite calm most of the time, just way too happy and lively. I have top grades at college, no problems concentrating.

I know this is vague, but could someone possible give an explanation, some advice or opinions?

No nasty comments, this is a personal thing and you are probably a lot freakier by picking or bullying someone that has never done anything to you.

thank youuu :) x