Constant attachment to a girlfriend!

I've just spoken with my old friend about an hour ago and he told me that he couldn't hang out with me because he would like to spend his time with his gf. From my observation, he always spends time with his gf and seems lacking of male friends. I think one of a famous therapist is ablsolutely right that modern man spends too much time with women and not enough time with their fellow men. No wonder they become quite depressed when the relationship is over due to the absence of support from other men.