I like my friends brother?

[Teenage]

He is a year older than me and we kinda talk more than I talk to my friend. He always teases me (friendly way) and he is always really sweet to me. I always see him looking at me and even when we are inna group or something and he's talking he will look me in the eyes and no one else. We always have great conversations and there never and weird silences. He invites me to hang out wjth him and his sister through his sisters Facebook and she tells me it's him when I get to their house or something. When all three of us are together he is always with me and it's great. ****he says he doesn't know my name and when I go to tell him he says my name right before me and says "right"????**