It seems you are a late(r) bloomer. Nothing wrong with that, before it was not the time for you, now you find it important, so you'll get there.

You can find people via the internet, but the internet only gives you that: the chance to meet people. It does not tell you how to turn those meetings into meaningful relationships. You should really learn to socialize at your university, so that you can profit better from the meetings you have, via the internet or the university, clubs, etc.

I think your priority should really be to try to find for yourself the ways in which you take pleasure in socializing with people. You seem to know quite a few things that don't work for you, concentrate in finding what works for you. Because let me tell you, someone who only wants to stay alone is often boring for a potential partner. It's not up to your partner to find ways of getting you out of your shell. It's up to you to do that, and then find a partner who shares your interests and participates in the kind of stuff that you're into.