Not sexually attracted to my fiancé…

Have anyone ever became not sexually attracted to their s/o?? We have been together since high school, going to be 10 years next month and have 2 kids. I want sex, I want to want my fiancé…but when it comes down to it I could go months without doing anything sexual with him cause I’m just not into him in that way anymore… I love him with my whole heart. He’s an AMAZING dad, helps me so much with parenting and with things around the house and I love his personality and I wouldn’t say I’m not attracted to him physically, but sexually- it’s impossible for him to turn me on. The rare occasion we do have sex, it takes so much mental concentration to put myself in the mood, I don’t even look at him during sex 😭😭it’s bad… I hate it cause I’m only 25. My sex life should be thriving. After 2 kids it’s def put a toll on it but even when it’s just us, I have 0 interest. Even just sexually pleasing him I’d rather 💀 and it’s def taking a toll on our relationship in those ways. Ughhh. What are your thoughts on this?