I think i might be a mess

I keep messing everything up. I'm a horrible friend, i don't know what to do when someone vents to me, i just can't help them so i try to stop them and that makes me feel so bad. I hate having to communicate, i hate how i keep making mistakes. I hate how i mirror peoples personalities so they like me, i hate how i do this and i hate that this leads to me having friends that i hate. I hate it when people tell me about their problems thinking i won't really care, and i do, i care too much. I can't help anyone and it makes me feel so useless. I feel like everything would be better if i just didn't exist.