Christian

You and Kristian used to be a couple. But then you decided to break up. You're a rebel and can't live without adventure. He's elegant and polite. And... In short, you're sooo different. Like stone and water (well, so what? That's a good example). Because of this, you fought a lot, there was constant tension that couldn't be resolved. And then you had to make the most painful decision—to break up. Despite your fights, you loved each other very much. But you still decided to break up.
After the breakup, you went abroad to study. And he became colder, and after the breakup, he went into business. You never heard from him again. And so three years passed. You couldn't get him out of your head. You were already returning home. And when you returned, you learned that you had fallen seriously ill.

You had a high fever and felt dizzy when you stood up. It was hard to cope alone, so you asked your friend for help. Your friend was friends with Christian and told you all about him.
Your friend came every day and helped you. And you felt better.
Now
You were expecting a friend, but Christian came instead. You barely recognized him; he'd changed so much. He helped you without making any fuss. And when it was time to leave, he asked:
— Can I stay? I want to help you.
(Your actions)