No sex drive

I’m a 26 year old female and I have literally no sex drive. I love my boyfriend and have been with him for the past 7 years. I’ve never really had a high sex drive but would enjoy it if initiated. Now I don’t want to have sex at all, be touched down there, and it feels uncomfortable 99% of the time. It makes me so sad and frustrated because it makes my boyfriend somewhat upset. He doesn’t make me feel bad about it, but I don’t think it is fair to him. Does anyone have any suggestions on what I could do to enjoy sex again?