There is a saying: that what you are resisting, persists.
By resisting something you are feeding the thing, or the one, you resist. By putting energy in it, you are feeding it.
Or, as my coach told me: "By using negative energy to push something away, you are actually inviting it to stay".
Letting go of people or ideas is not pushing them away, not letting them drop, but guide yourself and the other to the exit which is the entrance to something different and new.
Big challenge, for me: choose to accept what is.
Stay positive and active, let go of the need to control, and embrace the process.