Is he acting aloof on purpose?

He might have been pressured by his friend. He may have untagged the items if he has someone else that he is dating or interested in that your friend just doesn't know about. Or, maybe he's just weird and doesn't know how to act when he likes someone. I'm not sure... I guess I would talk to either him or your friend and see whats up. If you talk to him, just make it a very easy conversation and ask what he did the rest of the break or when you guys can hang out again or somethin like that... very casual, but if you say you had fun and you should hang out again and he makes up an excuse not to hang out with you, then he's probably not interested.