how can i read his mind?

am having a friend..we are close to each other..we'll share everything..text whole day..always he used to temme' i love you,i wanna marry you,i wanna live with you'..later somedays,he din uttered anything like that..i asked about that..he asked me to not to speak about that..but again now,he is saying me ' i like u.i like to speak with you'.i couldn't able to understand him..i don't wanna lose him..i too like him so much..how to guess his mind?