Boy advice

Need help!! So this might sound confusing but I’m going to explain it the best way I can. So I like this guy, a lot lol, but I’m 99% positive that he has NO CLUE that I like him & I don’t ever make it noticeable that I do around him only because I can’t tell if he would ever think of liking me like that but we vibe really well together. I just wanted to know if I should tell him how I’m feeling or just keep doing what I’m doing which is not saying anything & seeing what happens down the road. I’m most likely not going to say anything to him because the relationship or whatever that we have with each other is something that I don’t want to lose.