Haven’t had sex with my BF in forever!

Ive been dating the man I want to be with for the rest of my life for 3 years now. For the past 5 months we haven’t had very much of a sex life. It didn’t seem to bother either of us. We wouldn’t even talk about it. We work & live with each other and truly love it all. It came to my attention in the last couple weeks how little we we were having sex and it started to hurt me thinking he just didn’t want me. Or that maybe he was getting his pleasure from somewhere else. I definitely have a low libido so I wasn’t initiating anything. I’ve been trying to work on that but I feel like it would really help if my boyfriend world try and do more to turn me on. So I started to wonder why he wasn’t trying to touch me either. Eventually I brought it up to him and he got offended. He was really disappointed that I felt that way and said that he always wants me. I just don’t know why he’d never try and touch me. Been a few days and still haven’t touched each other. I’m just feeling a little crazy because we do have the best relationship, have so much fun, and love each other so much. Not sure why we can’t get the sex right.