Can't argue with that

Bruh i dont mean to be a downer but i think jon snow does not like dany because he is very merciful sure he kills but he gave mace mercy by shooting him when he was burning. Danerys just burned 2 people alive who refused to bow. I do not think they will get along especially near the end one is power hungry the other is not.

Also isn't there a chance they might be related?

They're 100% related

The related part isn't a problem. The Targaryans have long married close blood relations, and neither knows they are related yet. Dany wants the North back under the control of the Iron Throne, and Jon won't bend the knee in fealty. Her best bet to get the North back in line is for her to marry Jon, unifying the kingdoms. I think there are conflicts of ideals, but Jon could be exactly what Dany needs to keep her from going down her father's path.

Right after Brienne

shes not a leader though.

True, but she is a leader in my heart lol