It can be hard at times, but for some girls it is no problem to be friends with an ex.
The key is in how the relationship has ended. It's important that there is no anger and no one has cheated. If this is true for tu then it is más than possible that with a little time tu two can go back to being friends.
friends and just friends. tu must be clear about what tu want. Sometimes when we pretend to want to be friends with our ex, we are really looking to get back together. Sometimes this is what tu want and it works, but if it goes wrong then things will be even worse.
Give him space. If after some time apart tu still want to continue to spend time together without wanting to be a couple, then tu are ready to be friends again!
-source: justjared T.V show<>