Leaving her on the cliffs???
What the f*ck, seriously?
Your friend/your girlfriend takes suddenly and unexpectedly ill and you wait until she falls asleep out on a hillside then just leave her there alone while you go off and do fun stuff?
How did she not go mental and tell them both to go to hell right after that display of utterly uncaring and actual criminally negligent behaviour?
Sure she's in love with him but she's not stupid, she'd know that means he doesn't give one single solitary f*ck about her.