He asked you to stop. You're trying to force the response you want from him - that's petty and juvenile of you. Stop playing those games. If he was interested in you, you'd know it. That doesn't seem to be the case, so let it go already.

A few days ago he told you he just wants to be friends.

Today you sent him a message that was a blatantly transparent attempt to fish for some kind of declaration of love. Just admit it. If he said no, he would be mean. If he said yes, you would take it to mean he has feelings for you, putting him in the position of having to tell you again that he just wants to be friends.

He doesn't appreciate that game. So he told you to stop. And then you played dumb. Which he appreciates even less.