Listen, as a woman who was (in late high school/early college) deeply in love with (unbeknownst to me) a deeply closeted and in-denial gay man, this is not a road you want to tread. You need to destroy any remnant of romantic feelings for him and salt that bit of earth in your heart - you are quite literally wasting time and emotions on a man who can never, ever love you the way you want. You will pursue this baby idea as a way of tying him to you via a child, as there is no legal means for him to extricate himself from paternity responsibility.
If you’re lucky, at some point soon, he’ll find a guy to date or love and happily share the news with you. Then you’re either going to get your heart broken so hopefully you can get the fuck over him finally, or you’re going to turn into a jealous monster who ends up driving away your best friend.
Me, I was lucky enough to have my ex pull the “ignore her and she’ll break up with you so you look like a bad guy and it was her idea” move. (He apologized for it later, when he finally came out.) So I only wasted a comparatively short time with him, and moved on.