What's with this guy?

he puts his gf first, and their shared activities next (dancing, biking, etc), then his family/friends. A lot of times he cancels (even last min) on his family/friends just to be with the girlfriend esp if it involves their shared activities. however he has not introduced the gf to his family/friends, despite beign together 1 year. he is committed to her tho, no other girl, etc. and wants to make it work long term.