This is kinda long but ya.......?

so there is this guy at my school and he used to go to my old school (and cl) in 5th grade well.... i kinda like him now but i dont know if he notices me or even knows me...we never talk and my friend also was in my cl in 5th grade said that he didnt rember her.... well then a nother guy at a diff. school (in my 5th gd cls too) was talking to him, but he said that he did know me..... so what should i do i reallylike him