If you like a boy but you are not sure he likes you what should you do?

You should tell them how you feel about them in the most comfortable way for you, and if they feel the same way, then you can decide between you whether to give things a go. If he doesn't, you should be friends and see how things progress. but im a different person and if ur in high school then get one of ur m8s to snoop about and ask them questions but if you have no m8s then ur sad and just go up 2 him/her and say that u like them and if they reject u then move schools.