Can't get wet or orgasm with my boyfriend anymore?

In the beginning of our relationship, I used to get super wet and I'd orgasm every time from either fingering or head. That lasted for about a year and a half. But in these recent months, I haven't been getting wet and we've had to use lots of lube. Also, he hasn't been able to get me off. Not even close. I'm still very attracted to him, what's wrong with me?