Not getting wet?

So my boyfriend and I have been having sex for about a year and a half now. Usually I get super wet (sorry if that's tmi) but recently I haven't been getting as wet and my boyfriend noticed and asked me about it because he was worried that it was because I wasn't attracted to him anymore. I assured him that I'm still very attracted to him (because he's literally perfect) but he didn't seem to believe me. Any idea what could be going on with me? (Also, I just started taking Prozac about 2 months ago so idk if that could be why) any advice or explanation would be greatly appreciated!