The Art of Letting Go
Impermanence is a truth of life; the sooner we become aware of it and adjust ourselves to ride life's waves, the happier we will be.
Many things need to be let go of at some point, especially if they are people, things, or even places that hurt you or keep you from happiness or growth.
Buddhist philosophy, too, regards impermanence as a fact of life. Nothing lasts forever. Everything is part in a process, such as cause and effect, or the result of said process. Not even we make it out of the cycle alive! Another inevitable cost of living is suffering, but suffering too has much to teach us.
The lesson to be learned is that losing people (or things, places, anything!) isn't a bad thing. It is an effective way for coping with life's tosses and turns. It is best to let things happen, and make sure to cope with it by expressing our emotions in a healthy way. Sometimes you may need to let go of a toxic friend who contributes to your unhappiness. It may take a while to adjust to the change, but it is worth it to not have to be drained by their negativity. Life is made up of new experiences and each moment is a new opportunity. Don't let negative, draining people and things from your past keep you from fully experiencing the present!