Don't know how to talk to him

My boyfriend and I aren't very good at communicating serious issues. Usually it just gets swept under the rug. Tonight I need to talk to him. Because I'm tired of some shit and it needs to change or I just need to leave. But it's not that easy because we have a child together. So idk how to go about it because I feel like he's either just not going to listen to me or not care. So I'm almost like what's the point of even saying anything. But I know I need to because I'm tired of being nice and being taken advantage of. I'm just nervous to because then who knows if we're even going to get along the next few days or what. We don't usually have a lot of major issues, but We have now for a while I just never addressed them but after last night I need to.