He said no???!!!!?????

You seem super awsome. He obviously lied to you, so you deserve better. I had this same problem a few months ago. After we went back to being just friends it was really hard not to fantasize about kissing him, or flirt when we talked. This got really annoying because I knew he was dating. I would probably reccomend getting a new crush, someone who cares about you. Hope this helps!