I (25F) caught my boyfriend (26M) masturbating on the couch after a night out together. Am I reading into this too much?

I have been dating my boyfriend for almost two years now and we live together. Things aren’t the most romantic between us as Iv taken over a lot of the household responsibilities and he works a lot so we don’t go on dates often and have gotten into a bit of a routine that doesn’t include intimacy. The night before he staying up late watching YouTube and fell asleep on the couch, never coming to bed. The next day we went out to a BBQ with a bunch of my friends (mostly girls) and had a few drinks, once we got home and got settled he went to the couch to watch YouTube. I woke up around 2:30am because he had the volume on really loud and I got up to check if he was asleep and turn it down but when I got to the living room I saw him masturbating -I think to p-rn- on his phone. He didn’t see me and I stepped back into the room and made some noise to give him a heads up. When I went back out he pretended to be sleeping. I woke him up by saying his name and telling him I know he’s not sleeping and asking what he’s doing out here and if he plans on coming to bed. He said I’m sleeping it’s late go to bed. I said I wish he would come to bed and that I’m trying to have a romantic relationship with him and that’s part of it. He just mentioned how late it was in response. I was getting annoyed and called him out saying I don’t understand why he’s out here getting himself off when I’m on the other side of the wall alone in bed. He said it’s late and told me to go to bed again so I dropped it and went back into the bedroom. It was hard to sleep and I obviously am a little traumatized having witnessed that. Is this something all men do and I’m reading too hard into a common man thing or am I in a situation of ‘your boyfriend lowkey hates you’. I always try to bring up having more s-x and bought stimulant chocolates and said we could make a code word to make it easier to initiate but he’s never made an effort to talk about it or play into any of my options. I’m also a little thrown off that it was a night after spending the evening with a bunch of my girlfriends. Am I overthinking this? He doesn’t talk about his emotions very openly and having talks with him makes me feel like my voice is nails on a chalkboard. I’m tied into this lease with him but I feel so lonely and undesirable but every time I tell him that he just says he feels the same. Am I beating a dead horse? Is he choosing to masturbate because he doesn’t want me? Do you think he’s into one of my friends – Or just girls that aren’t me for that matter?

Also: I have not physically changed much in two years, I haven’t gained or lost lots of weight or changed my hair, clothes, etc.. nothing about my appearance has changed since we first started dating and we had a great s*x life but it slowly faded after moving in. I’m a hygienic and clean person I keep a nice space and I can sometimes nag him to help with dishes or consolidate all the clothes he leaves around but we do get along well around the house and have a nice environment. Sleep on his nice queen bed. I can’t think of any other influences that might have changed how he sees me except falling out of love/lust.