Can we still be friends after a breakup?

When there is a relationship between two people who love each other and lived a period of time with each other and lived a group of moments that may be good and some of them bad, but they remain lasting memories in the mind.

https://2u.pw/vaqnvzj
And when fate wills it and that couple separates for some reason, it is impossible for them to become friends after that, and no person can imagine becoming his ex-lover’s friend.
in my belief, the end of a relationship means that that person has left your life permanently and is no longer connected to your life
if the two previously linked people become friends after that, know that their relationship was not easy and real.
but if he is in a strong relationship, then after the separation it cannot be between them friendship.