This may seem like suicide, but honestly local school clubs can be a great way to meet people. I know, I know, you have to put up with the Narutards and the like, but sometimes they have some pretty cool friends in their circle.
I would say above all else is that you should learn to network. Talk to lots of people. Being attractive helps a lot. To me, there is nothing more appealing than a guy who has confidence in himself (but not to the point where you're overbearing).
Get involved in the community, find anime-related events, and just be cool. If some girl's reading manga, mention to them you're into as well and just start a conversation. In the cesspool there are a few hidden gems.
Just be confident. Best of luck, anon.