Should I move in with my boyfriend??

Hi, I’m trying to decide whether I should move in with my boyfriend or not. We’ve been together for a year and a half, and lately I’ve been having a lot of trouble at home with my mom. We’ve been fighting a lot, and I feel like our relationship might actually be better if we had some space from each other. I also feel like it’s probably time for me to move out, but financially, I’m not really in a place where I can afford to get my own apartment.
When I brought it up to my boyfriend, he suggested that we move in together so that we could split the rent and expenses instead of one person having to pay for everything. The only thing is, we wouldn’t be getting our own place right away. We would initially be moving in with his mom while we save money and transition into getting our own apartment.
I’ve been going back and forth because I really do feel like I need to get out of my home. My mom and I can be very toxic toward each other, and I think some space would be healthy for both of us. At the same time, I don’t want to go from living with one family to immediately living with another. I want to be able to experience having my own space but we also do need to save up money to be secure when getting our own place. 
I love my boyfriend and I can see myself living with him, so it’s not that I don’t want to take that step. I’m just unsure if moving in with his mom first is the right decision for me.