Long story short, my childhood was a nightmare. I was never accepted and I never fit in anywhere. My "friends" were around when they wanted something I had and once they had it, they were gone. I eventually found that being alone's not as bad as it's cracked up to be. As the years went by, I DID make some new friends here and there, but I rarely put my trust in anyone. Too many times being stabbed in the back by those who supposedly cared did that. Once I stopped caring what people thought of me, life got much better. Trying to please everyone is a fool's errand that will bring you nothing but misery. Once you learn to enjoy your own company, you'll find that life gets better as you do. You don't need everyone else's validation to be happy. Just be yourself. Never think others have your best interests in mind because they DON'T. Be nice when others are as well, but don't be anxious to let others into your life. Be VERY selective and you'll rarely go wrong.
