Sex drive is GONE?! help :(

Ok so I’ve never been an incredibly sexual person, but now I have NO sex drive whatsoever. Nothing turns me on, and I can’t even get myself off! I struggle with depression and anxiety, and I am on medication. (bupropion, which supposedly doesn’t have a negative affect on sex drive). My SO and i have been together for almost 4 years and he’s wonderful in bed and in every other way, but I just can’t seem to get my body excited about sex. He used to make me cum multiple times when we’d get it on, but now I very rarely orgasm, even when watching my favorite kinky videos! I’m running out of things to try, does anyone have advice? I miss being horny!!!