I understand you, OP. I'm like that - what most of the world seems to consider 'beautiful' doesn't really do much for me... and the girls that I find attractive would probably be considered average at best by most others.
My thought is to at least give it a shot. Go out on a few dates, fool around a bit, etc. and just see where it goes. It may be that your feelings for 2d are too strong to be overcome. But, exposing yourself to something new might be what you need.