That's my personal favorite, how they look so happy with the new person yet you know he was obviously talking to multiple girls and just trying to boost their own ego lol
My last guy shows off his new girlfriend all the time, even though she is not attractive, uneducated, and doesn't even have a job
A lot of these guys settle for what they know "won't leave them" in order to feel like the "superior" ones in the relationship. He probably didn't feel like the "man" with you because you're a lot better than he is and he saw that as a challenge that he couldn't handle
A lot of immature guys act that way in a relationship, you don't need someone like that
A real "man" will see your worth and really, the most insecure and unhappy relationships are the ones that are thrown in other's faces on social media...it is a researched truth