What can i talk about?

Me and my friend.We been knowing each other for about a month now. He lives to far away so we cant visit each other. hez a really great friend. but i think our friendship will end soon bcuz i dont kno what 2 talk about. I kno almost everything about him so i cant ask him simple questions like watz your favorite color or movie. or do u have any siblings. and many things like that. I think hes shy, and so am i a little. hes in a gang so yea. if i ask about skool all i can get is a,it was ok. which doeznt lead into a conversation some people say that i should talk about my day or an event that happened. like that really works. i do but only get a cool back. we text alot cuz theirs silence on the phone. what should i do cuz the things people tell me izent working. What should i talk about.