Not Like The Guy I Knew?

Hey guys,

I wondering if anyone can give me some advice or answers to my situation. My boyfriend dumped me about 2 months ago via Facebook messenger, it was out of blue because only a few hours before that he told me he loved me and that we were good. Since the break up he has given me no explanation via message or face to face. I have recently found out that he is on tinder begging girls to meet him for sex and is going out partying at the weekends which is strange because he never use to like clubbing, apparently he went with some girl that's known for sleeping around. He's not how i knew him, i don't know why he's acting like this.

We had been together just over a year.
Not Like The Guy I Knew?
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