Me (23F) and my bf (22M) have met about a year ago through a friend in common, but I've also met his best friend the same day, who I'm gonna call X while writing this. I was single when I met them both, but I was pretty much only attracted to X, I was kinda obsessed with him and I really wanted to try things out with him. However, my bf started flirting with me at the time and I ended up falling for him and we began a relationship, our relationship is closed, to be clear. After we started dating, I would still find X attractive but I wouldn't be as interested in him sexually. Recently me and my bf have been having some issues in bed, his libido doesn't match mine and I end up feeling quite frustrated sexually. I have a really high libido, and I am hypersexual. He never was a really sexual person, and ever since he started taking some medication for his anxiety his libido got even lower and now he can't reach orgasm which makes me even more frustrated bc one of my biggest turnons is pleasing him. We had a few talks about having more sex and doing things differently but he says he just doesn't want to have as much sex as I do. Also our sex life is kinda boring, he doesn't really seem like he wants to do it ever. We both had open relationships in past relationships and I thought maybe I could have someone just to fill these needs... However, to be clear we both were forced to be on these other open relationships and we didn't really enjoy them bc it was a traumatic situation. But we're very open minded. We also have friends who are non-monogamous and so on. Either way, we met up with X for drinks and I noticed I started flirting with him unconsciously and after that I've been having a few sexual fantasies with him. I feel like a really bad person for that because I love my boyfriend and I'd never cheat on him but I also can't help feeling this way and I think it's bc I'm so frustrated with my own sex life. I wanted to tell him about so we could understand what we can do to solve it. We are very open and honest in communication. I've tried posting it on other communities but it seems like ppl just get angry at me so they don't really give me what I could do as a solution. Is this just wanting to cheat or is this smth else? I'm not even sure if I should mention it or if that'd hurt him too much.

TLDR; i have a sexually frustrating relationship and im not sure how to fix it; also been fantasizing about other ppl that are not my bf, his friend