Hi LaurieLynn-
And Welcome! I'm sorry you went through all that, very disheartening, going from a dream to a nightmare, although not unique around here, we understand.
My question is why would he do that, knowing I would it together and know it was him? Can someone help me process this?
Think attachments with borderlines. You were an attachment, you left, you abandoned him in his head, the worst thing that can happen to a borderline, that doesn't feel good so he tried to contact you. Posing as the friend may have been because he feels shame over what happened, so he wouldn't contact you directly, but he wants to feel an attachment anyway.
So you were together for 7 1/2 months, and how long has it been since you broke up with him? And how are you doing emotionally, in addition to this social media thing?