Based upon what you’ve described, it appears he’s interested. However, that does not mean you should pursue him or a relationship with him. Just continue to be your very friendly self… There is nothing wrong with you smiling and saying “Hi” etc., but do not ask him for his number or his email address or anything or the sort.
If he likes you (for more than a friend) he will figure out a way to get to know you better and he will work up the courage to ask you for your number or for a date.
Remember
