AIO boyfriend won’t have serious conversations with me

AIO i am 19 f living with my 25 m boyfriend. we have been together for almost two years now and have lived together around 5 months. throughout our relationship he hasn’t really mentioned much about what he wanted as a career but about a month ago he told me that he signed up for firefighter training/classes. when i first heard that i wasn’t too excited because it’s a dangerous job and he had just gotten a motorcycle not even a month prior without any conversation with me and i just genuinely feel like im being disrespected constantly with him just doing whatever he wants like none of it affects me. a couple weeks later he just decided to talk about how when he’s a firefighter he’s going to have to do shifts where he will be at the station for a couple days then be home a couple days. honestly, i really don’t want to sleep in a cold lonely bed so. it’s really just the fact that he keeps making pretty huge lifestyle changes without even considering me in any way. i told him that i don’t know if im going to be able to handle him being gone especially because I have over the past couple months, continued to find naked women and only fans content on his phone. He has even gone so far as to talk to girls that he used to know from high school that would send him videos and inappropriate stuff on Snapchat. throughout those couple past months it has been really hard for us to get along. We argue a lot, but we have recently been getting a lot better with being able to talk and communicate with each other but he still just does things that he doesn’t see is wrong, but I just don’t know entirely sure if I’m able to, live that type of lifestyle and I just feel so unconsidered not having any prior conversation before him committing. we were actually planning on getting married six months into the relationship when I had first turned 18 it did not work out because I was not ready and I understand that and I know that he understood that but now I am talking about marriage since I am ready for it and he used to want to get married so bad and he was so disappointed, and obviously his opinion can change, but now he doesn’t want to get married. It is almost like he doesn’t want to have any sort of commitment with me. There is just no commitment in our relationship for anything