Physical intimacy struggles with partner

Does anyone struggle with having sexual intimacy with their partner? I just got diagnosed with PTSD and I just started therapy for it. I would cry most of the time if my fiance and I were trying to be sexually intimate together. It’s so hard for me to be aroused the majority of the time when we try (not because I’m not attracted to him because when I am I AM) and it happens every blue moon that I want to initiate sexual intimacy with him. I just feel so badly for him because it’s not his fault and he is so loving and supportive but I was hoping maybe someone who has made it through that phase with their relationship can give me some encouraging words of hope or advice on how they overcame or are working on it with their partners. I also have severe relationship anxiety(ocd) too that I developed from my PTSD too so pls be gentle ❤️