Question

Its difficult to accept how one can change so fast

Answer 1

When we like a person so much that we cannot imagine our presence in their absence then a small change in their behaviour is also not acceptable.

because we never preassume about the change.

but change is mandatory.

we have to understand and move on

Answer 2

Well u got accept the fact and learn a lesson... it surely feels bad but if ur very close to the person then u can sort out things and ask directly the reason behind the change