Thoughts in breakup

I just had someone in my life that I told everything to daily… He was my best friend.
That is now gone because we are no longer together and cut communication.
I don’t know how to be friends with someone I love that does not want to be with me. I’m not over him to be his friend. I know that would not be a healthy friendship to continue right now

I find myself so lost with him not in my life and missing that constant person tell all to. My friends have their own lives so it’s different… How do you resolve this thought?