No, you aren't weird or something. Unrequited love is an age old thing that most of us have experienced at one time or another. All because you weren't lucky with this girl doesn't mean that you will fail in all other relationships. You should try with other girls and broaden your horizons. It also doesn't mean that later on she might not consider you as a possible boyfriend.
Since you are in college and probably don't have the time to commit to a very serious relationship, just chat with her and be casual. Give her insight to the person you really are without making undue advances. If it's something that is going to really work out in the long run, then it will work. Be honest and truthful.
The reason why she hasn't replied might just be that she hasn't even opened her computer or had the time to look. All because email and internet is instant, doesn't mean that the person on the other end is any less busy at the moment. She simply may not have even read your message yet, and even if she has, maybe she just needs a little more time to answer.