Sounds to me like they're jealous and insecure. They're probably used to helpless girls and don't know what to do with you. And there's that group-mentality going on, like they're bonding in making fun of you. If this is the situation (as opposed to good-natured ribbing) your best bet might be to divide and conquer. Is there one of the guys (has to be a guy, ideally the least insecure of the bunch) that you like more than the others? If so, maybe invite him to lunch or some other non-date-like activity, just the two of you. Odds are good if you can get one of them away from the group he'll be pretty cool to you, and once he sees you as a friend picking on you won't be so appealing.