Why is it so hard to make friends?

Today has just been a shitty day, I suppose. I'm a college freshman. I went to a big event with a committee that I've been meeting with for a year, and I barely talked to anyone the whole time. They just all seemed so comfortable together, and I suppose I could have talked, but I didn't. My only two good friends here happen to be in a relationship (6 years by now, good god) and they're really great, but sometimes I feel as though I'm a third wheel, or I'm getting in the way. I try to get involved, I'm in a part of that committee for volunteering and a member of the society of women engineers, but I'm just not good at talking to people. I'm not completely unnattractive or un-sociable, I'm just not good at small talk or anything. I don't know why I'm posting this, I guess I just need to get this off my back, that I feel pretty shitty right now, and it's a saturday night and I don't have any plans and I have a dorm room to myself and I'm a bit lonely, even though when my room mate is here I often wish I was alone. I guess I'm just selfish. Anyways, I'm living with the two of them next year in an apartment, to make things weirder, although they invited me to live with them. Maybe they just felt sorry for me. But they do like me, I know they do, and we're all very close. I don't know. I just wish that I wasn't such a loser when it comes to events and nights and stuff, I've never gone to club or had any alcohol and I just feel as though I need to live a little bit. I'm just yammering on here instead of in my journal, and I doubt anyone is going to read this far, but kudos for you if you are. Just giving you a little piece of my shitty life, and yes, I've seen the freshmen 15 (the freshman ten for me, I suppose) and I'm not very confident about my body or self image. I know that I'm fairly intelligent, just apparently not intelligent enough to get anywhere. Ugh.

/rant

Sorry about that guys. I guess it doesn't seem like a question, but if you guys have any tips about college friend-making, that would be great.

edit: Thanks to all those who read and replied- upvotes to everyone :)