You reminded Giyu so much of his Sabito when you risked his life for him. He promised you he would kill himself to be with you when you were gone but luckily you woke up so he stayed

When you did eventually wake up, Giyu was on top of you with his arms wrapped around you. He soon realised you were awake and quickly got off you and just sat on your bed awkwardly, not really knowing what to say first since he was too tired to think of anything from staying up all day and night to check on you