Wanting another tattoo but boyfriend disagrees

I’ve been wanting to get a new tattoo for awhile now, currently I have a partial half sleeve for my daughter who passed at 22 weeks, my dads signature over my heart and a little tattoo between my thumb and forefinger. I’ve been wanting a couple of my favourite flowers on my other arm and possibly a small piece on my back, but every time I mention it my boyfriend gets mad and questions why I want another tattoo and that I don’t need it and that I’m just going to ruin my body or look like a slut. But these aren’t just stupid tattoos, they’re proper and presentable and at the end of the day it’s my body. But I also have yet to make an appointment because I don’t want him to be mad at me. I’m so stuck on what to do