Signs he wants to commit?

My bf and i have been together on and off a yr and a half..but its been on 7 months...we were only not together 5 months out of the yr and a half. i love him so much. he talks about having kids with me. even to the point of trying to have kids now. he even started talking about what kind of house he wants to live and details of it. He told me that he wants to become one with me. We see eachother every few days. the other day ui asked him what he was thinking..he said how much i love you. i said how much do you love me? he said u r here arent u? i went over to his place and we were watching a movie. He picked me up from school the other day. driving out of his way to see me for a couple hours before his job inteerveiw. i even went by his sis who was in the living room. his sis answered "hey girl" really uplifting. :] do u think he sees me in his future for long? or even marriage?