(NSFW) I walked in on him masturbating in the next room. He could have just asked me.. What do I do?

Additional details: I am 22, he is 26… We aren’t even fully dating yet because he will not make it official although I’ve brought it up multiple times and we act as though we are dating. That is another story, however.

I am quite fed up with him at this point. I suppose I would rather be alone at this point. All in all he can be and is a really sweet and kind person but I’m wondering if the times that he acts like what I’m about to explain (and things I haven’t explained yet) are even worth it.

Sometimes it is like walking on eggshells around this guy. He can be so touchy about little things. I think it was Thursday night and he wanted to have sex, but I was really tired and very gently let him know that I was tired and didn’t feel like it. He called me lame and went to sleep.

the next morning he had to work and I have school and I wanted to, but he said we didn’t have time for that which was true because he had to be at work at an early time. I wasn’t mad about it but his tone told me that he was salty about last night. Anyways, he is sleeping all day today and I am trying to connect with him, get him to watch something with me or eat something instead of being in bed all day, and I tried to have sex with him, but he didn’t seem to want to which was fine. I continued about my day working and doing things. Anyways, I came back and I greeted him and let him know I’d be in the next room watching something. Anyways… I come in to check on him sometimes and when I did, he jumped and put his phone down and I gave him a kiss and hug. He told me he was masturbating. no hesitation. almost like he wanted to hurt me which wouldn’t be surprising. I told him that he literally could have asked me and he said that I wouldn’t want to or he thought I wouldn’t or something dumb like that EVEN though I tried a few times to have sex and he didn’t want to (I even blatantly asked him earlier and he responded with a groan). I was expressing how messed up that was and he was like MAYBE he will think about it after he is done. The freak? Am I some puppet? So disrespectful.

I’m very exhausted of dealing with childish behavior. You would think that since he is older he would be a bit more mature than he is but I’m honestly tired of being hurt and then made to feel like I’m a bad person. I’m about to make him go home and officially be done with this ‘relationship’. Thoughts before I do this? I don’t want to act irrationally.