He is your Adopted brother, your parents adopted him when he was 5 and you were 7

He likes you alot since now, One day he got sick and your parents are away you two are the only one home and you had to take care of him because he's younger than you. Later that night you are on your bed ready to sleep and then suddenly you heard the door. it's fuse he is knocking. he said

"Hey.. can i stay with you for a while?.. I'm feeling lonely" He said outside of the door and still has a fever.