Hi xbubblesx,
It sounds like you have a lot there to cope with at the moment. I can understand a bit about how you feel as I also grew up in a similar situation and then went on to really dislike life for awhile.
The good news is that there are ways to feel a bit better, like posting messages online as you did and then hopefully over time you will begin to feel even better and better. I know it may seem pretty dark now but it can get lighter for you.
It sounds like you have some fantatic goals on mind with wanting to be a model, act and do fashion design along with wanting to go to America. I'm originally from there but now live in the Netherlands (I also lived in Estonia and the UK so can appreciate your desire to travel).
It's always good to try and pick one thing that you are very motivated by and then use that as a motivation to help on the other areas in your life. Maybe I can help a bit with that if you would like. You mentioned that you are 15, have you started thinking about/looking at some fasion design or acting schools? What other things do you enjoy doing or want to do in life?
I'll keep an eye out for any posts you write back.
Best wishes,
Heather