I'm been there... and I am there somehow cause I still never had a girlfriend. Though I've changed a lot.
Advices???.... to be honest, no advice received here for me has worked out. And I receive all kinds of advices, so many that I started feeling guilty for so many people trying to help. I actually started this kind of topics in this board "How to get a love partner?"
All I've got to say is fight, fight, try and try. Face it, persevere, and you are not gonna like the outputs and the situations, and the failures but do it anyway, if not you're gonna be sad of being in the same situation and not trying anything... unless you are never attracted to anyone...
And be patient.