How will this turn out? Please answer!!!?

So me and this guy are good friends, I have a crush on him and I think he likes me cause he smiles at me a lot and talks kind of weird when he's around me. Sometimes we carpool in the same car to a game cause were on the same team. He has a twin brother that I like to joke around with. So once after a sports game I had to wait at his house for my mom to pick me up. He showed me all of his pets and when it was time for me to go he didn't say bye but he just did one if those smiles that you try to hold back. So guys tell me, does he like me, is it good to talk with his brother more to make him jellous and do you think we'll be in a relationship?