It is hard being a girl. I know. I am one. I was your age once. And yes. When your best friend gets a boyfriend you can feel jealous and abandoned. Let's face it. Us girls have all been there. That is when you realize you don't have a life.....
Please don't leave college. You need college. As much as you want to hide, it is the last thing you need to do. You say you hide behind your sarcasm. Well, then I have a question for you. What are you afraid of.? .I have raised two daughters, so I am not talking in a territory where I am unfamiliar. Until you identify what it is that you are scared of - be it intimacy, or letting someone know the REAL you - then maybe you can get past your sarcasm which might get you toward a boyfriend. As far as your weight is concerned, once your attitude towards yourself changes, your weight will come off. I probably didn't tell you what you wanted to hear. You have self-esteem issues that you need to address. I bet you are a very pretty girl who just misses her best bud. So, if that is the case......find other things to do, your best bud is still your best bud, only with a boyfriend.......and if you change your attitude you'll get a boyfriend too!