finally coming to terms with sexuality yet im being teased

im finally coming to terms that im bisexual. I'm currently trying to get out of a toxic situation with a man relationship wise and I open up that i'm accepting myself for being bisexual and all he can think about is how hot that is and that the neighbor across the street from me who is attractive he decides to send me pics of her as a way of teasing me. How do I explain that I dont appreciate that and thats one step further for me to leave the relationship from him and just coparent our daughter we have together?