Need advice

Ok so my ex boyfriend and I dated for more than 6 months but broke up about a year ago. but we went through a lot of stuff together( his dad died). Anyways this winter we started talking again and hooking up. And we starting basically dating. However he decided to get a new gf but we decided to remain really good friends. The gf doesn’t like that we still talk. He had to unadd me on Snapchat when they’re together. Idk is that a little too sketchy. Also idk how to be ok with their relationship. Like I pretend I support them and I do. But it hurts. Any advice for being ok with how things turned out??!!