Ok , hoping you guys can help with this ?

Up until September Last Year I was friends , and the odd beer buddy with a guy across the road , started out as lending lawnmower ect , him and his wife and kids were nice , great little family unit , so I thought .
Then in September I saw his wife moving out , but she left the kids with him , that great as , as far as I know they were both great parents , but with 2 days the guy started dressing as a woman , actually he look very good as a woman , elegantly dressed , even his hair , a neat bob and barly any make up , but the odd thing is he has completely blanked me , even if I’ve try to make light conversation.
Do you think I should persist and show I’m friendly , and cool with him , and not judging him in any way , if he just not sure or shy of his situation , he’s a great father and as far as I can see the same guy