My Son Growing up so fast!

He's been doing things that I have to now sit back and watch him grow into a Handsome Young Man. He's got all that natural testosterone so he's good with everything happening naturally. His hair is starting to get thicker on the top of his head. He has done went to his first dance and from what I heard, he has a Girl Friend at school. I don't want to make him feel its wrong to have a girlfriend so I really don't push the issue with him. I am trying to be more understanding to what his needs and wants are. I'm just not ready for him to grow up too fast.