Friends with ex partner

[Cuppa123]

Is it possible to be friends with an ex partner after a split from a long relationship? If the relationship just isn't working out due to distance etc, but you still think they are a good person and don't want to lose their friendship?

I'm good friends with my eldest's dad, my ex husband, who is the father of the other kids and a more recent ex bf. They're all decent men, the relationships ran their course.

It's a mix, I would like to rebuild the friendship with an ex, but if they are not sure their partner would agree then that can be a barrier.