No more sex

I realized that the moment I have sex with someone, I almost always end up resenting them, and cancelling any long term plans I might have for them. I kinda view them differently IYKWIM. I am dating this chick and I realized I'm so into her like extremely into her, but I fear when we do the deed, I'll be out. I like this feeling of being with her and loving her more than what I'll feel having sex with her. So I've decided I'm gonna hold it for as long as I can. I just hope she doesn't think it's weird that I'm not even trying to have sex with her.