Welcome!

I think it would be a good idea to back away from the friendship and keep things on an acquaintance sort of level. Be courteous and polite to him, but do not engage with him any further.

It sounds like he idolized you and what he didn't know about you, he filled in the blanks in his mind. And then when he got to know you, the truth set in that you weren't exactly how he envisioned you. As a result he's taken to being rude to you. Kind of like a little kid throwing a tantrum when they don't get their way. (It is a bit immature IMHO.)

I think you should take the high road and rise above his childish behavior. I think its good that you found out the truth about him now, how he acts when things don't go exactly as he planned. Honestly, this speaks VOLUMES about the person he really is. I think you may have dodged a bullet.

I mean think of how he would have reacted if you two got serious and then got married....but the relationship still didn't work out? He probably would act a whole lot worse, I'm guessing.

I think distancing yourself from him is best, and keep your relationship professional. If you can, branch out and try to find new friends outside of your circle. Hugs.