You are massively being fobbed off!
personally I don’t think he has any intention of going to the GP but the question I would be asking is WHY isn’t he bothered about going to the GP?
Why isn't he interested in fixing your sex life?
Me and my DH have been going through a tough few months and my sex drive has dive bombed and it has probably affected my husband in the same way you are currently being affected, and it has upset me so much to see him feeling rejected when I genuinely don’t mean to do that. This morning I went to the GP about it and yes, it’s a slightly embarrassing topic to discuss, probably even more so for a male, but I did it because although I do want to get my sex drive back, I also want to have a sex life with my husband, I want us to have the intimacy and closeness that we used to have. So although I did it for myself, I also did it for him, and for us because him and our marriage is important to me.
So you need to accept that for some reason your DH isn’t interested in dealing with this, but you need to also question why he’s not bothered.
He knows how much this is hurting you and he still isn’t doing anything about it, which shows he is selfish and doesn’t care about your feelings.
But it’s also important that you realise he isn’t missing having an intimate connection with you, and he doesn’t want to get it back either, and that speaks volumes about how much he values the relationship.
Talk to your husband again but stop making the lack of sex the focus, and instead focus on what really matters, ask him why he isn’t bothered about the impact it’s having on your marriage and why that isn’t enough to make him see a doctor.