if someone loves you, what should you do? here I list a numbered of suggestion to you as an alternative what you should do if someone is loving you.

1. if you love him/her

just accept their love professionally. means, don't too childish, or acting like a clown, jumping and jumping, screaming, and so on. just need to smile and say, thanks for the chance they give. 

2. if you don't

maybe you can be his/her sister/brother. and say it politely and appreciate his/her feeling onto you.