Libido low?

Hey everyone, I (f23) and my bf (m29) are almost at our 1 year mark of being in a relationship. That also means a year of me being on antidepressants (Zoloft and Lamictal) for the past 3-4 months, I’ve been on the same steady dosage and feel great on it. I’m also on the IUD for birth control (about 2 years).

Lately, I noticed that my libido is so low. At the beginning of our relationship, we were constantly going at it and we both enjoyed it, but I was told that going at it so much would eventually cause for us to get tired/bored of it. I’m not tired or bored of it and same for him, we just don’t have sex multiple times a week like we used to. We’ve fallen into this rut of the same sex positions every time and me giving him oral. I think I’ve also focused too much on his satisfaction that I don’t really feel like having sex anymore because as a woman, it takes much more focus and concentration than it does for him. 15-20min of doggy style and he’s good, and I’m not even close to my completion, if you will. Not sure where to go from here. He’s been taking a Blue Chew which is sorta like viagra without telling me he’s taking it so he’ll be in the mood while I’m ready for bed. And I’ll feel so guilty because he’s dealing with the pill’s side effect while I tell him I’m not in the mood and ready for bed. Or sometimes, I even convince myself to be in the mood.

It’s so weird. Before him, I was very interested in being sexually active, then now I feel like I’m okay with not having sex for weeks, or even months.

Not sure what to do from here ☹️.

Any advice or thoughts are welcome!