I like this guy but he doesnt know and i really like him what do i do?

ok i like this guy named conrad and he doesnt know but ever since third grade he has been my kinda sweetie i used to wait on this tube on the play ground every day and he would always be there and we would talk all recess long but i really like him now and i am in 6th grade what do i do i want him to like him but every one thinks he is so despreate when he is not he is just lonely and i want to be with him he has green eyes brown hair and a really really cute smile and is so sweet he understands everything but he is still like a guy