For the past month I had confidence, everything felt like it was going extremely well. I got a job, had girls interested in me, working out everyday with friends, going to be on varsity swim team, etc.

Then this weekend I woke up to reality. I got yelled at numerous times to the extent where i thought i was gonna be fired, at work tonight. I am sitting at home because I had to work while my friends were out having fun. No girls are talking to me anymore. I am not as smart as I use to be. I have no idea what I want to do with my life. I went out to a party last night, and both girls I danced with LITERALLY FUCKING RAN AWAY AFTER 6 SECONDS... 1) I know I am not ugly at all 2) I approached both of them from in front, so its not like i creepily randomly started dancing with them
I have noticed I am an extremely boring person. I am funny, but not interesting. I cant really talk about interesting stuff with anyone. Girls will be interested in me, then will quickly lose interest because I have a boring personality.

I want to be the popular funny guy that is always happy, going out with friends, and has girls beggin for him. But I know that is not who I am at all.

Over what? Something that was your fault, or something that your boss was being a blowhard about? It's easier to be a bad boss than a bad worker. Was the boss's yelling proportionate to anything you did wrong? If it's an abusive situation, don't put up with it, go find other work.
What does that mean? You stopped studying? You fried your brain with chemicals? You finally starting taking courses that were more difficult than you were previously used to? Your head is fogged all the time because you're suffering from depression?
Daunting, but it happens to many of us. A variation on this, is having too many things that one could be doing with one's life.
You could be projecting your bad mood to them. Or they could just be brats. Really, spoiled bitchy little girls shouldn't be a huge shock to you, they can be that way.
What interests you?
I think you'd be better off liking who you are, instead of having an image in your mind of what other people are supposed to like. But first, you have to figure out what you actually like about yourself.

The best thing to do is Go Hard and Take Risks so what if two girls ran away who gives a sht what did you make that mean? did they discover your hidden flaws from doing the macarena dance.Grow back your brass balls to not give a fck, Next NexT NEXT! if you cant handle a high number of rejections then only open girls who give you IOIs and dont hesitate strike while the iron is hot .Get out of the way of your own success your self loathing is a self fullfilling prophecy.