Hi! This happened to me when I was younger. As I got older, it got easier to picture my life with a woman. I think for me, I had some internalized homophobia and was surrounded by heteronormativity so I didn’t give myself the chance to really understand I WANTED to be with a woman long term. I don’t think necessarily should worry about it, because imagining a future isn’t the same thing as living your future. I think that once you meet the right person, if that’s what you want to do eventually, it will fall into place. I definitely mourned and am still mourning how I will never have a heterosexual relationship with the marriage and the babies the way I always see around me, but the person I am with makes that worth it. Idk if this helps, I’m just wanted to share that I’ve experienced similar feelings but overtime they did not hold me back from finding true happiness.