In sorry you are having to go through this. Unfortunately for us, transphobes are an inevitability sadly.

That specific point anout having children is a very weak and shallow view on transgender issues. There are plenty of reasons somebody physically cant have kids, but you wouldn't factor that into a cis persons gender identity. That fact that it is so shallow makes me think that your crush hasn't really done more than scratch the surface when thinking about transgender issues.

Thankfully a lot of the time this sort of prejudice is due to ignorance and not some underlying hatred, so theres a chance that on reflection people can change their mind once given real points to think about. You have to think about to most people who aren't a member if the trans community, it's all new, and their thoughts are underdeveloped and coking from a place of ignorance.

That being said, crushes come and go and your mental health is much more important. If educating one transphobe is going to cause you significant suffering then you need to focus on you instead.

If you want to chat privately or more in detail, my inbox is always open.