The only opinion that really matters is your own. However, you've said you don't fantasize about women sexually and you do fantasize about men sexually, so it's possible you're gay, or maybe homofexible (you're mostly into people of the same sex but are occasionally sexually attracted to members of the opposite sex). I think the fact you want to be in a relationship with a woman, and have kids (which typically involves sex, for most people) means you have romantic interest in women and possibly sexual interest, but there are plenty of gay men who are biological fathers, so that's not necessarily the case.

Hope that helps. Remember, you can ask us as much as you want, but in the end only you can decide. I know that's scary but it's the truth.