What would you think if you found out that the guy I met got into a relationship with another woman after we met up on Facebook?

My suspicions were confirmed when I met up with a 33-year-old man but he did not reply to my texts and stopped texting me after meeting up. I later discovered that he was already dating another woman and that I was not going to be part of his relationship. There were some red flags, like stopping texting and not telling the truth, and I blocked him and that seemed immature. Young men can be immature, but older men can also be immature. What would happen if more than one occurred. A similar thing happened to me but didn't meet up since another guy already has a girlfriends and i also did blocked both of guys now.

What would you think if you found out that the guy I met got into a relationship with another woman after we met up on Facebook?
Post Opinion