Did you ask when he told you they'd slept together why he wasn't honest with you from the get go? I would have. I suppose maybe he had to tell you on his own terms and didn't want you to dislike him still being friends with her if you had originally known they'd hooked up. Has he been dishonest about anything else that you know of?
So, so you think you can tell Heaven from Hell,
blue skies from pain.
Can you tell a green field from a cold steel rail?
A smile from a veil?
Do you think you can tell?
And did they get you to trade your heroes for ghosts?
Hot ashes for trees?
Hot air for a cool breeze?
Cold comfort for change?
And did you exchange a walk on part in the war for a lead role in a cage?