My ex did a 180 and is so fake now. Guys, have you ever changed completely?

Anonymous
Ok my ex still acts like he wants to stay friends, but I honestly don't know if I can because he's so fake and different from what I knew.

He removed all his close friends (since highschool) from his Top (which he didn't have before it was randomized) and now has some people on there that I know he is and will probably never be close to.

He said he was not ready for a relationship but after knowing this girl for 12 days he is now in a relationship with her.

It's just not like him to do these things. OK fine let's say he's fallen for this chick. Well, she's not his type, she's slutty, kind of dumb, and her good friend is someone we both know whom he can't stand but now acts friendly with. She's already acting jealous with girls that he knows. He posts stuff on his MySpace (I don't check it but my friends still talk about stuff on his page) in a language like he's a 17 year old highschool girl. (His girlfriend is 18 and a senior in hs).

What's up with that? Did something snap inside him and he's become a new person? Is he really unhappy and creating a fantasy land? It's so unlike him. He seems kinda superficial and impulsive now. He told me a while ago that he was just doing what "feels right," but honestly he doesn't seem happy.

Has this happened to you? Did you change or someone you know change so quickly?

Updates
+1 y
he's 19 btw, ignore my age
My ex did a 180 and is so fake now. Guys, have you ever changed completely?
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