Now in most of them I see the one posting about this event going on in there life asking why its happening and what to do...so on. However I never saw one not one mention that people change.
My advice to anyone going threw this:
Go ahead and ask them but you must also keep in mind that people change throughout life and never stop growing. You will gain and loose friends all your life, that's just the way it is. There are a select few who will always be there for you (don't forget that either)
Its just life.