Letting go

At what point do you let go of a friend?

Let's say that you used to be very close to someone. 
Fast forward to the present.  Now months and months can go by without speaking to them. 
Perhaps you are the only one to call, email, or text. 
They always claim to miss you and be happy to hear from  you, but if they never reach out to YOU, are those sentiments really true?
Can they really mean it?

Yes, life is busy. 
But come on.  If you want to keep a plant alive you have to nurture it (or so I'm told), just like a relationship.  If only the tiniest amount.
People don't have to be your friend.  Shouldn't you appreciate them reaching out to you? 

...

So when do you let go? 
When do you say "We had a nice day in the sun," wish them well, and move on?

I have a hard time letting go, but the stronger I become as a person, the less I am willing to be hurt.

Maybe some balloons people are meant to be released.