"They're going through a phase"

I have come to realization about that quote. They always say there are just going through a phase and they will be back to normal soon. But I think the point of phases is to go through a change. And going through a phase most definitely changes someone, which means that the chances of them "going back to normal" are very slim. A phase for the person is normally a pretty good thing, but for their friends, not so much. Going through phases brings new friends into your life, which consequently sometimes leaves your old friends behind. Unfortunately I feel like one of my closest friends is going through a "phase". And right now I don't like who this person is turning into. Things are changing and I can feel it happening, and this part is not what I wanted to happen. Maybe things will turn out on the sunny side when all is said and done. I can only hope.