Am I wrong for wanting to get my own apartment?

I’ve been with my boyfriend for about six years. We had a stable relationship until 2 years ago where we just started arguing a lot more and started to become on and off. We’d break up, get together and something would go wrong so he’d literally just disappear or ghost. I stopped that toxic cycle until we had a serious and emotional conversation about it and decided to get back together and get couple’s therapy early/mid 2020. The relationships been okay again but way better and kinda back to normal & we haven’t been on/off. Before all of this happened (on/off stuff, arguing more, therapy, ghosting) we were in the process of planning to move out together and decided to wait until we were good again to start planning. He wants to get a place with both of our names on the lease where he can pay the rent and I do certain bills. I told him I’d rather get my own place and pay everything myself and he can come over whenever because he has a history of flip flopping and leaving me when shit goes wrong. Although he hasn’t since, it’s still a factor to consider and all the possibilities. He got mad because of that and tells me how it’s gonna be too much to handle and too much money. I asked my friend her thoughts and she agreed with him that it’d be smarter money wise and if the relationship was normal again, then I should trust him. But honestly, I’m more comfortable knowing if it may happen again, I won’t be in a tough spot trying to figure my way out and I’ll have my own home.