Some relationships (friends, co-workers, or romantic ones) in life are not supposed to last; yet some survive; maybe we need them for some reason, or there is no urgent need to discard, or some other reasons I cannot think right now.
But when the time comes to stop that relationship, kindness and positivity/neutrality is always better than having arguments or cutting the ties with no real conversation or understanding. Respect for being fellow human beings, kindness and having good wishes for each other is a way better situation than other alternatives. (Of course, if these feelings are possible – when for example somebody is constantly hurting you, I do not think there is a need for this extra effort).
There is no room for unnecessary resentments or hard feelings. Life is short and precious. Positive or neutral feelings/memories are better than negative ones. We can try and be at peace with ourselves and maybe with the other person.
May all your relationships that need to end do so peacefully.