How do I (30f) get over this hurdle and reconnect with bf?(27m)

So im not really sure how to word this all, so apologies in advance. I have suffered from MH for many years and seeked help as well as meds for the majority of it. This usually does kinda get me out of my bad moments, but obviously, having it every day is still something i have to deal with.

My bf is wonderful, sweet, and honestly has been there so much. These last few months, i have had it pretty rough with my MH and have taken time out of work for it. Ive gotten to the point where there have been some issues with our sex life especially and im becoming more snappy and less tolerant of him(even when hes not even doing anything bad) and although i love him to pieces and dont want to break up with him, i just feel so trapped and lost, but also so lonely at the same time.

Also, with the whole sex life situation, at the moment, it feels a bit emotionless, i guess. He is very tired all the time, so we dont do it that often, and when we do, he kinda has to stop a few times, then struggles to finish. I know this is something he can't help, but im just trying to figure out how we could overcome this and reconnect again as a couple. (We have been together 9ish months just fyi)

I also had this in a relationship a few years ago which was about 5 yrs long, but that also ended because we both got too stressed and couldn't cope.

Is there anyone that has maybe experienced this? Maybe some advice on how to get through it?

P.s. i am currently receiving treatment for my MH, which is slightly improving