Wow, I had these same questions when I was an incoming freshman. The thing is, at college people get really into the college scene and get drunk at frat parties and have sex bc the alcohol screws up their judgment. I think you should live the college life and party and join a sorority if you're really outgoing and like to have fun. Just be careful because if you are too wild people will find out and your reputation will be of an easy, slutty girl and then it will be hard to find a boyfriend. There are always good guys on college campuses...but be wary of frat guys because they tend to care less about settling down and care more about partying and hooking up with as many girls as possible.
And as for pressure to have sex...as long as alcohol isn't messing with you, you can make your own decision whether to lose your virginity or not. I was also a virgin going into college but I found the love of my life and lost my virginity willingly to him, and it was well worth the wait.
I guess overall, yes, there's peer pressure and alcohol that will cloud your judgment but you CAN find the right guy. You will meet sooo many people and despite what people say, there are definitely guys who want to settle down.