Explaining

It's hard to explain,
This feeling I've got.
It's like betrayal,
But at the same time it's not.

It's hard to explain,
The dull ache inside.
When you tell me what happened,
There's a smile that won't hide.

It's hard to explain,
Why I'm smiling at you.
After what you just told me,
We should be through.

It's hard to explain,
How I can still laugh.
While I was with her,
You were with your ex other half.

They were both forbidden fruit,
I guess this really is the end.
But at least we're laughing about it.
At least, against the odds, we're still friends.