Remember, be calm, or you will be embarrassed in the future! Then go to the handsome guy and tell him that you are going to class, but you forgot to bring your mobile phone and ask him to borrow it.
If successful, you can call yourself on his mobile phone, so that you can have his mobile phone number. Then tell him your roommate didn't answer the phone and called another roommate instead.
At this time, you will really call your roommate and return his cell phone to say thank you. Bye. After that, you can text him with your mobile phone to say thank you, or ask him out for dinner? This will make the future possible.
If it is rejected, it doesn't matter. If you meet again next time, try another way to strike up a conversation. Generally, a handsome little brother without a master will lend it to you. After all, they all belong to the same school.
Anyway, that's how my little brother came. You can't have a heartless little brother. If you feel that your current image is not very good, then don't go to bed, even if you go to bed, it's useless.