FFS I had 4 paragraphs typed out until my cat walked on my keyboard and somehow deleted it. So here is a half assed second attempt. “Sex without love is a meaningless experience, but as far as meaningless experiences go, it’s pretty damn good”. - Woody Allen I hear you. I was brought up in a very Catholic family and taught that sex was sacred and all that. I was lucky enough to be "in love" twice through high school and first year uni so got my start that way but then essentially stopped trying until I got to grad school. Then I subscribed to the above theory and became a total ethical slut. Please remember that when it does happen it will probably be awkward, unsatisfying and you will not be any good at it but that is completely normal. You usually can't be good at anything without practice. So try not to let that natural fact negatively impact your thoughts on the situation. And coffeesp00ns also has a great point in that it may be that you are just not interested.
Yeah, I've accepted that the first time is has high likelihood of not being great. I'd be lying if I said my inexperience doesn't translate to a lack of confidence in myself sometimes, but I'm not ashamed of it or anything. It doesn't help that I'm now living back with my parents in a sleepy little market town with virtually nothing going on. I'm currently working on my escape routes.