She might be scared. for some people it justs seems akward and uncool to date a freshmen. I'm not saying that's right, but peer pressure can really affect you if you're not careful. Some people can ignore it, some can't. it's really that simple. Of course anyone can get over this fear, but it's hard. I think you're taking it a little hard, but I wouldn't jump to crazy. Time heals all wounds. Maybe that's just what you two need. Time.