Hurting so much

I hurt so much right now. I am surrounded by people that either have relationships or are at least dating. Me, however, not so much. The one person that I've really liked in the past year or so isn't a possibility anymore. I need to quit fooling myself into thinking that he'll ever think of me as anything other than "dude" or "buddy"......I'm just a good friend to him and I need to realize that. I need to realize that I've been single, and probably will remain single, for a long ass time. No one has been interested in me in so long that I don't even remember what it feels like to be truly cared about. Lauren called me last night and was bitching about money and guys. FIRST OFF, I've got more money issues than she'll ever know and I'm only 21! SECOND OFF, she JUST broke up with her boyfriend of 4 years and has already had more dates since then than I have in a couple years.....I've been single for 3 of those 4 years so I don't sympathize AT ALL. I'm here for her but it's so hard to sit here and not yell at her and cry my eyes out. I'm ugly and fat and I know it but to not have anyone be interested in me in years.....well, that just proves it and makes me hurt and die inside even more. How did I get like this? No one is ever intersted in me and I'm not one of those girls that even gets flirted with that often. I mean, sure, there are guys at work that I'm friends with that flirt with me but it's not the real flirting, it's the "we're friends and everybody flirts with everyone else at work" type of flirting. I just feel so unattractive, ugly, fat, lonely, etc.......I don't know how to get feeling better about myself. I keep secluding myself from people because I hate seeing how happy they are in their relationships and stuff.....it just makes me realize how alone and unhappy I am. I don't want to burden anyone with my problems or self esteem issues. I know that everytime I talk to someone about how I'm feeling, they just tell me that I'm pretty or whatever but I don't really think they mean it, they just want to get me to shut up about myself so they can go on talking about their boyfriend and their lives. What am I gunna do? I've been so depressed lately and I don't know how much more of this life I can take. I'm not suicidal or anything I just don't know how much more of this pain I can take. I'm afraid that I'll be single for the rest of my life and that I'll have these tears permanently staining my face. I just wish someone would love me.....I mean truly love and care about me. I've got wonderful friends and I wouldn't be here if it weren't for them but I just need more right now. I hate living alone now.....like, I love the freedom of walking around with no inhibitions but it's sooooo lonely here without someone to cuddle and sit around with. I know it's not all about having a boyfriend and everyone says "you're young, date around and have fun" but no one seems to even want to just date me. I just wish I knew why I was so undateable and unloveable. Another night of crying. Another night of loneliness.