I feel like I don't enjoy having intercourse as much as I should.

I am a man(24) who's married to a woman(23). When we were dating we would do everything but have sex and I've never had a problem whether its masterbating or oral but now that we are married and having sex I don't enjoy it as much as I thought I would. My wife usually comes way before I do and she usually asks if I got it. Sometimes I think she gets a little frustrated with me and I know I am. I don't know maybe I just built it up to much in my head or something. I just feel like I should be getting more pleasure from it than what I am now