Don't dispair. It will get better. You've been through a lot it sounds and your entitled to be hurt and sad (anyone would). Here are a couple of simple things to brighten your thoughts:
-You can't change the past....but you can begin to change your present and your future
- you don't trust so easily but oneday you may find trust again
- you're very young and you have a full life ahead
- you can more easily recognize good vs. evil
- Though you feel abandoned, God sees your struggle and will be there for you if you ask for him
- while you think your parents failed you....they still love you
- you will find forgiveness in time
- you have a heart because its felt pain...so it can feel kindness
- Above all.....always.....you're still you
I know it means little to hear from a stanger....but I'm sorry these things have happened to you. I felt all the anger in what you wrote and the hoplessness (which I understand very well).
P.S. - Nice Legs!