Maybe he's flirting with you in some kinda "Text" way. He might like you too :) or you should ask him. Than you can have this entire conversation on something involving relationships maybe. Teehee :) -Stephanie :D
A guy may use smiley faces during texting to show he is happy with your messages. It is not certain that he likes you by using the smiley faces, though he may be flirting, or showing that he is exited by you two texting.