Even posting pics of them together in her bed. I believe she's doing this to make me jealous or get a reaction from me or maybe just moved on.

My question is tho, how am I supposed to react to this shit? I dumped her yet for some reason I feel like I was dumped because she moved on fast.

I have a lot of mixed feelings about this. I think I shouldn't care because I dumped her, but at the same time I feel like a doormat for not doing anything about it. But then if I do something (like try to make her jealous too posting myself with girls) I'd be falling in her game.

What does a redpilled guy do in a situation like this?