Sex Anxiety

I’m currently in a long term relationship, but for a while now, I’ve had so much anxiety related to sex that it’s not even enjoyable anymore. We used to have no issues, but because my bf dealt with work stress and didn’t feel like having sex often, there were periods of time when he didn’t want to have sex at all. We’ve gotten into a place in life where things are more normal, but we don’t have sex regularly even though I want to all the time. Then when he does want to have sex, I get so much anxiety. I think 90% of it is because we don’t do it often, so I’m not comfortable with it and out of practice. I love sex and doing stuff on my own, so that’s not the issue. Some of the most uncomfortable parts for me are not knowing what to do with my face/where to look when he’s going down on me. I also struggle with actually doing sexual stuff to him because I’m just so out of practice. I’m not really sure how to fix it or how I should ask him to help with it. We’ve had many many conversations about just doing it more often to help me get over it, but that just hasn’t been happening. Any advice would be helpful!