Advice needed!

Okay, so long story short...

I've been with my boyfriend for 6 months, and we are living together. Everything is going great, apart from the fact that he is overcoming addiction.

His sex drive has diminished, whereas mine is and always has been extremely high. We still have sex but it's becoming less and less. It's making me extremely depressed.

I've tried talking to him about it, at first he assured me it would be fine and that it isn't me, but now he tells me that he doesn't like feeling pressured.

I still love him but this is really getting to me. I'm at a complete loss on what to do. Any advice would be greatly appreciated! x