don't know what to do

I don't really know how this thing works. I just need somewhere to put all my feelings because I don't know who I can actually talk to about any of my problems. I don't know who actually likes me and who doesn't care about me and that isn't really something you can just ask.
I just feel like shit about myself. I don't really even know what to do with my life anymore. I'm always upset and I'll just get into these states where I can' t think one good thing about myself. This usually comes from a problem with my friends or a guy. The guy part is probably why I'm so upset right now, because I actually thought that he liked me and now I see how wrong I really was. Maybe he was just using me, maybe not, I'll never know. Maybe he was just taking advantage of me. Part of me feels like that isn't such a bad guess but I honestly don't know. I feel like no one understands even though that sounds ridiculous. Of course they understand, I'm sure it has happened to all of them too. I don't know something just doesn't feel the same about this. I don't know what is wrong with me. Maybe I really am just too ugly, fat, dumb, or mean. I really don't want to be any of those things but I guess the mean thing I can't really help. I truly try to be nice but it doesn't always work out how I want it to. And I truly can't trust anyones opinions about these topics because they have to say something nice because they are my friends. Sometimes you have to say stuff because otherwise you will truly hurt peoples feelings. Half the time I don't tell people my real feelings because I'm afraid of people judging me or just the fact that I might truly hurt them. I would never intentionally try to hurt someones feelings but I know that I do all the time.