Let me start with I love my wife. We have been together for about 9 years now. Married for 5. Anyways, my wife deals with some anxiety and OCD which she is medicated for. I usually only eat once a day and it is in the evening after work, gym and after our boys are in bed so around 8-9ish. She usually smokes marijuana to unwind and we watch a show or movie together. 

I only eat once a day and so this is the time I usually enjoy to eat. This has been a usual thing for about a year now. For whatever reason, not sure if it has been her anxiety lately or the marijuana but she tells me I can't sit with her and she gets pissy with me if I eat something loud and crunchy next to her. Saying "you chew so loud". She has said this for most of our relationship but not with irritation like lately. I don't feel that I'm eating or chewing any differently than I have my whole life but I guess I am a loud chewer?

Last week she through a fit about me chewing next to her while we were watching a movie and I got upset and just put my food away and decided I just wouldn't eat anymore so we could at least spend time together. Sometime I even change what I plan to eat to something softer and less crunchy so my chewing doesn't set her off. It isn't all the time either, there are times when I eat in my game room while playing video games. She has said sorry and admitted to me it is a little crazy. She diagnosed herself with misophonia (condition in which a person is overly sensitive to sounds. Usually the trigger sounds are noises made by other people, such as chewing or tapping a pen). 

I love my wife and I love food. We love to watch movies and spend time together. She loves food too, I just want to be able to enjoy all the things together. 

TL;DR: I eat in the evening while spending time watching shows with my wife, she tells me I can't eat crunchy foods while watching with her. 