I am probably going to sound like an idiot but please hear me out. So we are both 20 years old. Our relationship is still great all around but for me, sex with her is just dull. We only do missionary and she always just lie down, except for kissing she doesn't do blowjobs or any other positions. I get really tired after 30 or so minutes ( just missionary and foreplay that I do for her) plus the fact that I don't feel anything (probably due to condom or years of masturbating) so needless to say I don't like sex but she does and she always demands it at least 2 times a week. Basically yesterday I told her that I can't keep doing this unless she agree that we try something new, she denied and said anything other than missionary is too tiresome for her. I basically responded with "I put a lot of efforts and tried a lot of things just to make you feel good so why don't you just do this for me at least once? I feel like masturbating is 10 times better than what I am having with you right now". She told me that why don't I just masturbate instead so I told her that from now on I would limit the time I have sex with her and masturbate instead. She got angry and said "You are a horrible person". So am I demanding too much? Am I the asshole in this?