Plate texted me 30 mins she was supposed to come over and said she was going to another guy's place tonight because he had the room to himself tonight and she hadn't fucked him yet. She met the guy at the same party she met me about a month ago. She had talked about him previously with me too so I knew he was. Not gonna lie, he's taller than me, buffer than me and better looking face wise and 3 years younger.

How to proceed?