So what now?

My ex and I had a semi amicable breakup. We understand that we can’t be together at the moment. And we like each other as people. We’re each other’s best friend. It’s hard to end things cold turkey when you still want to find a way to be friends with them. I’m still heartbroken that we broke up and I honestly wish it didn’t have to be this way, but I know it does. I can’t help but want to check in and not sure if it’s on a friendship level or romantic level. But it’s hard to stop talking to someone completely. It’s also hard to try to heal and grow if you’re still in contact. I don’t know bc I know that even if we never get back together we can still be friends but I don’t know where that friendship starts or where our relationship ends. How long do I have to wait to talk to her? How do I cope during this time where I feel loss and loneliness almost?