Not to be blunt, but it sounds like you may be lacking confidence, and there is generally nothing more appealing to a woman than a guy that is sure of himself.
Take two different guys who are relatively the same on the "attractive," money, and whatever else scales. One of these guys approaches a woman in a bar, for example. He's nervous and avoiding making direct eye contact as he stumbles to make his approach. Once there, he can hardly think of what to say to her, let alone get the words to come out smoothly, still looking everywhere but into her eyes. On the other hand, the second guy approaches the girl with a confident smile, knowing exactly what he's going to say, and having no trouble getting the words to flow. Which do you think the woman will show interest in?
"Your partner is like a box of chocolates; There will always be some pieces that you just don't like."