FWB deleted me from his FB friends?

I know him for 5+ years we have some mutual friends together. I think he found out that he was not the only one I was seeing. But why de-friend me on FB when he was also seeing someone else. Oh yeah...I'm totally better looking than all his other girl friends by far. I would have not mind us just being friends. I think he also found out that my Mississippi Luv'r was coming in to town and days later that's when he defriended me. Why act that way?
FWB deleted me from his FB friends?
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