Tl;Dr I crave sex on an emotional and physical level, my wife doesn't.
I have always been a very sexual person, and have had problems explaining this to people in the past. I have been married to my beautiful loving wife for two years now, and am having problems. We have had sex about three times this year, and everytime I get the feeling that she is just doing it because I want it and not herself. After our latest coupling she seems to be surprised that I'm not "all better now". I just can't find a way to tell her that I feel like I'm being treated like a dog, and sex is my treat. When I start to become frustrated or distressed, she always seems to want to make plans to have sex. It's beginning to make me feel guilty about accepting the sex, like it's demeaning me. But I just can't help myself, and have no idea what to do or say.
I'm sorry if this post isn't done correctly, it's my first post. I'm just at my wit's end.