Well ... Since this situation as been talked to death and could go on and on... I will toss my 2 cents in as well.

The only way I see this is... you asked 3 times and he said no 3 times and left .. You will never hear his side since you and him will never talk again according to you so trying to know for certain what he was or wasn't thinking is a useless exercise.

Why not "use" this situation as a learning tool ? In the future when you ask a man and he says No .. Take it as a no and don't keep asking.

I hope your able to find closure at some point and your able to move on into a new relationship.

Just my opinion of course

I wish you the best