Give advice about my friend

[gamblore99]

SO I Went out with a friend last night. The guy is 22 and I don't think he has kissed a girl. Now I have other friends who are not that successful with woman but the reasons are more obvious. This guy is 6'3, good looking, and extremely athletic. He has good personality and is very fun when its just a small group where he is comfortable.

I thought he might be gay, but last night we went to a party and he didn't talk to anyone guys or girls. It seems like around a large group of people he doesn't know he completely clams up. Even when people try to talk to him, or get him in a conversation, he just gives yes and no answers.

I've tried talking to him before about his lack of approaching/social skills but all I get is an "I don't know" and then he changes the subject.

Can anyone relate to this guy or have an idea what his problem may be?

(If it matters, we have been friends since gr1 but stopped hanging out about 6 years ago until recently.)