Faded lust

Why does excitement lightens as time goes by?
Why does ethusiasm dies away as time goes by?
Why does eagerness grows fainter as time goes by?
Why does thrillness meets its limit as time goes by?
&
Why can a friendship/relationship lose its colour even if they have already been through years?

I'm in a dilemma now of telling my friend the things I heard.
What if it's unreal?
What if it's the truth?
How should I tell her that he saw him with a girl with their hands together?

Now, it seems like some are drawing themselves away.
Now, it seems like they are as happy without us in their lives.

Now, I finally realise what Zhenwei meant in his post in Destinedfriendship on the 20th January.
Now, I finally understand why he can be so agreeable with Zhenwei's thoughts in that post almost a year ago, while it took me a year to do the same thing.