i always suffer with that, and girls can pick up on it, which usually kills it for me. I usually ruin it by getting physical right away, which makes them think it was only about sex. When i wait too long, they think i'm gay because i dont pick up on the signs.
Also, i'm not sure if you're doing this or not, and I'm certainly not a pro, but i do better when i'm the "real" me, and not the "socially correct" me. If you're serious about her, she's going to have to know the real you, so make sure you let her see that. I may get laid more often with the socially correct me, but i have never had a worthwhile relationship out of it.