Im not a fucking child!!!

Ok so i have this one friend who is really starting to get on my nerves. Every time i do something that she thinks is wrong she is immediately on my case and starts talking down to me as if I'm fucking five years old!! And people have had the nerve to get up me for it yet its as if no one else sees her do it but me!! She is really pushing me to a point where I'm going to snap at her. But that will only make me the bad guy cause i know she will cry as soon as i do. Talk about stuck between a rock and a hard place..... I have two options but I'm not sure how that is gonna go down with either one that i pick. Either way shit is gonna start. 

Why am i such a fuck up

Ok now in my life i have a habit of fucking everything important to me. But now i have gone and done it. I have made the biggest fuck up yet. I have let the girl i love down. To the point where i don't think she wants to be together anymore. I have a habit of talking down to people and being rude. The only problem is that I don't know that I'm doing it :( and to make it worse I come of as clingy. She is the first thing in my life that makes me truly happy. I just want to be with her as much as possible. I act like such a child because i don't want to grow up. But now its wrecking the one thing i care most about. I have to start being me now. Not a child but me. Hopefully i can make things right before it ruins everything