I'm sorry you're having this problem! I'm not sure I can fully relate because I've been with the same guy for six years, and never really dated much before that. But one thing that comes to mind is maybe your body language. You mention that you seem unapproachable. Pay attention to how you stand -- do you stand with your arms crossed in front of your chest? That's usually a signal to others that you don't want to be approached. Also, smiling and eye contact can help you seem more receptive to people. And if all else fails, and there's someone you want to approach you, go ahead and approach them! If you have any insecurities, they're going to come out in subtle ways through body language, so maybe work on your self esteem and self confidence.

I also don't have any experience with online dating; but I've found that a lot of people who use the internet frequently are more comfortable with it as a form of communication and tend to tense up and get nervous in real life situations. Or some people simply express themselves better with the written word than verbally. Some of that might be coming into play when you try to move the relationship off line.

I'm sorry if this wasn't much help, but I mostly wanted you to know that I saw your post and I wish there was something more I could say or do to help you! I don't think you should give up hope. Maybe you need to try a different avenue for meeting people -- perhaps a club or group through the school you're attending or a community sport or something along those lines. Good luck!