Do you think this is true too?

That a woman becomes a mother when she is pregnant, but a man becomes a father when he holds the baby? 
My boyfriend has been acting distant sometimes and still wants to go out to the bars with his friends until 2 or 3 in the morning on the weekends. Then, he will sometimes want me to come with him. 
I guess I am just a lot more excited and I am the one planning everything.