event horizon

He tried to smile, though his eyes remained unchanged. He nodded.
- So, when do you leave? 
- Four months. End of June. It's so far off.
(Please, please ask me to stay. I'm scared. I'm hurt. Just ask me to stay.)
- Okay.

And that was that.

Some event horizons are so small, you don't hear the star implode on itself.

Event Horizon: The boundary (‘horizon’) of a black hole between its ‘outside’ and its ‘inside’; those outside cannot know anything about things (‘events’) which happen inside.

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Today's Prompt: 

1. Write about someone who was a mentor for you.

2. What have been the event horizons of your life - the moments from which there is no turning back?