I did another post weeks ago but my ex following me to work and being stalkerish.
This is beginning to calm down now.
Anyway, i was video chatting to boyfriend of a few months last night and i had a call off a private number twice during it (he was using someone elses phone as ive blocked his). I then received an email off my ex saying he was trying to get in touch.
Whilst on video chat, i told boyfriend as were open with each other and basically told him i dont know what else to do.
Boyfriend then started talking about his ex girlfriend who he hasnt officially been with since 2017 and how if she ever found out he had a new girlfriend she would send him a message as when he was dating a girl last december she found out and sent him a message. Also, he tokd me how they were pkanning to meet for a coffee in march but it never happened.
He then proceeded to talk about how in july 2018 they were both out and drunk and had an argument and then after their argument tried to book a hotel room but none were available.
I dont get why i needed to know this 
I told him how i'd be weirded out if another ex popped up and how it's been ages and we're in our 20s so she shouldnt need to pop up anymore. They were together 3 years so i understand she was a big part of his life but it's getting to me how often shes brought up.
I dont bring my ex up much, only really when he asks me if ive heard anything.