My best friend talking to my ex

Ok so I was talking to this guy he made me feel happy different we stopped talking all my fault my friend knows why and stuff. And today she sends me two messages and was like “John” just called me fine and get your mans of my dms and she was like my boyfriend can put u on to a guy just forget about it after I asked her to see the messages so me and my other friend decided to add him on snap he added the both of us back should I like talk to him or am I over reacting I need actual opinions because I’m hurting like shit