I was with with my ex for nearly 5 years. We'd been arguing a bit, I was prepared to work through it, he wasn't, so we separated at the beginning of last year. Took me a long time to get over it.
A couple of months back he reached out and we met up. Fast forward to now and we've been seeing each other again, taking it slow but felt like we were sorting things out.
I found out today that he has a girlfriend that he's been with for around 4-5 months. I feel sick! I haven't told any of my friends or family as they weren't particularly impressed with the way he ended things or the fact we had started seeing each other. He doesn't know I know and has just text asking to meet up tomorrow. Shall I call him and tell him what an absolute arse he is? Block him without explanation? Tell the girlfriend?