Should I tell him I like him? Does he like me back? Should I wait for more signs?

So I really like this guy on my bus but we've only known each other for about a month. I want to tell him I have a crush on him but I don't know if he likes me back? He sent a friend to see if I like him but it wasn't really that straightforward. Should I tell him I like him or should I wait for more signs he likes me? Help!!!!!!!!!!!