Dating doesn't do it for me - how can I change that?

I've never been in a relationship before, and I've also never had 'crushes'. During highschool, everyone around me had their crushes, whilst I just never felt anything for anyone. I do really want a partner, I love affection and I'm extremely kinky / freaky however whenever talking gets more intimate, it just repulses me. I have no idea why. I love the idea of sex, romantic relations, and having someone else, but whenever anything starts, it just doesn't feel nice.

I've talked to a few guys who have confessed to me, but I don't get that stomach feeling I hear. It doesn't do anything for me but I do really want a significant other. Whenever I imagine having someone beside me it's incredibly nice, but when talking to real people about things like that, it just doesn't. What can I do to change this?