Concerns about our sex life

I absolutely LOVE my fiancé! No our relationship is not perfect but generally speaking we are peanut butter and jelly. This is my issue. I know that supposedly men sexually peak in their late teens and twenties. Well I’m 32 and my fiancé will be 37 in a week. Of course in the beginning of our relationship we were doing it all the time every position, etc. I figured the honeymoon phase would pass which I’m fine with and we did have some devastating family stuff happen in the past year or 2 so I get that can def impact our sex life. I dunno if this is tmi or what but I love sex. I find my partner attractive... but I like everything even tho oral is really the number one way for me to orgasm. My fiancé tho loves blowjobs and I’m happy to accommodate but I feel like that’s all he needs to be satisfied. Many times as soon as I stop blowing him to get into a “position” for intercourse he’s already gone soft. We’ve discussed it. He says it’s not me and he doesn’t want me to feel bad about myself or insecure. He said he wants to work on it but I don’t even know where to begin... anybody else have something like this happen? Any thoughts or ideas or solutions? Like I said I love to please my man but for me I like the entire experience not just the part that makes me cum. Help!