<human>: On Christmas Day, I was spending time with my family when I got a new friend request on Facebook by a guy with only a few friends, that had with profile picture of a pretty appealing dude. 

Under investigation of the account (could tell it was fake right off the bat) they had a lot of similar interests to mine, almost too similar. Links of my favorite songs, mixes, and photos that I post to mine in a very similar fashion. 

I accepted the request and got a message of a heart sticker...asked them who they were and they go on to tell me they had met me at a concert I was at back in October, also copying my exact way of typing. This profile was made entirely to attract me right down to every key to this fake personality. Thought that maybe it was an ex trying to stalk me, so when my boyfriend messaged me I acted as if I knew it was him.

 I called him by the name of the fake account and he suddenly admitted it right after it whole heartedly. I was shocked and taken aback, I don't understand why he spent so much time making a fake account of a more attractive person who were pretty much a male version of me, it seemed almost obsessive.

I'm having a really hard time rebuilding our trust because I just can't seem to get it back anymore. He really hurt me because I thought we were on a good path and stronger and better than that. People who make fake accounts are most often weirdos or have a hidden agenda.

I have a sense of betrayal and I don't know why. What does it mean when a lover pretends to be someone else & talks to you on social media?

Could you distill the essence of the text into 1-3 sentences?
<bot>: my bf (possibly ex) made a fake in a means to attract me and admitted to it almost immediately but I still feel hurt and kind of disgusted by the lengths.