No sex drive

I don't know what's going on with me for the last 6 months or so my sex drive is so low. I want nothing to do with any of it, I don't see the point in it anymore, and sometimes the thought even grosses me out a little. Which is super duper weird because I used to be obsessed with sex for years and have always been kinky so it's not like I can be really do anything new or exciting.

I can't even get turned on by the thought of anything anymore. Maybe it's because I'm in a long term relationship now?

What can I do?