Looking for some advice

Im stuck between whether I'm the good one .In the right place for me or the uneasy one. So I hardly have any friends left. I only got 3 left out of a whole crowd full. My family and i don't get along. No matter how hard i try where constantly getting into fights. I just wanna be left alone but someone always trying to pick a fight. I let my bestfriend and go. She was extremely toxic for me.The reason i have hardly anyone left is because they weren't right or good for me. I found myself making dumb decisions because of them and I finally wanted to change for the better so i did what i had to do. It seems like no matter how hard i try to be a better happier me everything seems to fail me. So I'm stuck wondering why I'm constantly doing whats best for me and basically have no one. While everyone i let go is having the time of their lives. Having fun and etc. Why doing what's best for me so lonely and sad. Is there something wrong with me because im honestly starting to think that.