should i break up with my boyfriend over this?

For context, my bf (M26) and I (F22) have been in a monogamous serious relationship for 3 years. We currently have been living together on our own for a year. Our relationship has been filled with a lot of ups and downs, like any relationship. However, the last few months have been tumultuous. We haven’t seen eye to eye on so many things that have effected the core of our relationship. There has always been verbal abuse, but just recently things have gotten physical to the point where we were fighting over a knife last week. After expressing several times what I need from him in this relationship, I have become so exhausted from trying to make this work that i’ve completely checked out.

That brings me to the main point of this thread. We both just started at this new job, today being his first day. I started about two weeks ago when I met this guy who I instantly felt a physical attraction for. Over the last two weeks, he has made it more obvious the feeling is mutual. I haven’t said/done anything out of pocket that would go against my boyfriend’s boundaries, but I feel like things could escalate if I don’t address this with my boyfriend because he already has noticed this guy checking me out and has made it very clear he does not like him.

To be honest, I don’t feel as though being committed to this relationship is working for me anymore. I have felt like this for several months now. I want to be friends with benefits or just friends and still live together until one of us can afford to move out (most likely being me). I don’t know how to approach things because everytime I do address my feelings, he immediately gets defensive and we argue and get no where. It’s also not easy to just “leave” as I can’t afford a place of my own right now. I’m working 7 days a week just to get ahead but it’s been taking a lot of time. I really could use some advice on how to approach this with him.