You were sick. It was Christmas holidays and just before you had caught the vomiting bug from someone in school leaving you very sick.

So your boyfriend being the sweetheart he is, invited you over so he could "take care" of you which was basically gonna end up as cuddling in his room.

You lay in his bed feeling extremely nauseous as he went to get a pan so you didn't have to get out of bed if you needed to vomit.