Help plz ❤️

Ok so I have a crush on this boy in my class and I have for a while now. He knows I have a crush on him because it’s pretty obvious lol (I’m not that good at hiding it) and people have told him. When I first started liking him he also liked me and told me he did but we didn’t do anything after that. Now I’m not completely sure if he still has feelings for me because sometimes he flirts with me and acts like he does but then other times he acts like he doesn’t. Should I tell him I like him? Should I ask him if he still has feelings for me? Should I ask him out? Should I not do anything? Please help me 😫