Sorry in advance for a long winded post. I just need some advice and a place where I can just write this down

I’ve been with my girlfriend for 5 years I’m 24 she’s 23 she makes me the happiest I’ve ever been but from the start our sex life has always been dry. She has a very low libido, which I think wasn’t helped by a previous bad relationship and I have a high libido. From the start I knew this and I have always tried to help her by keeping sex a positive thing. Never suggesting it. Letting her dictate when we had sex. I never wanted her to feel uncomfortable.

At the start it was fine we’d have sex a few times a month. We’d talk positively about it asking her if there was things she was discovering she liked/disliked. As I said a previous relationship she had no say in what happened. But in this last year this has all come to a halt. We’ve not had sex or oral of any description since January. We barely even kiss now. Any time the topic comes up she ends up crying because she feels bad so I now find it hard to talk to her about it. And deep down it’s affecting me a lot more than I could ever tell her. I’m doubting myself now and if she still loves me even tho I know she does. But it’s at a point where it’s now this big scary taboo subject for her that I don’t think she’ll ever get over and I don’t know what to do. I really want to help her feel more comfortable but I just don’t know what to do