The past is gone, or at least it should be and you can't do anything to change it! You may have had some bad experiences growing up but bro, so did everyone else. I mean this very compassionately... get over it!
You can plan for the future but you don't get to live there... the only thing you can control is YOU, right here and right now. Enjoy your friends but don't expect anything
from them. Be the best friend you can be, the best person you can be. Remember, we only grow through adversity, the same way a weight lifters muscles grow. Embrace difficulties because they make you stronger, develop your character and prepare you to handle the next one. Adapt and overcome. You are either in a trial, coming out of a trial or about to enter a trial... that is life!
Always remember... life is good!