Haven’t had sex in almost 3 months…

My boyfriend and I have been together for over 5 years, and we’ve been through a lot but never went this long without having some sort of intimacy. It’s not him, it’s me, he still wants to. Every time we talk about it and try to start it I just get really angry and no longer want to. I just hold onto fights we have and harbor it. How do I fix this?