Bf/Gf generally is a pair of people, a couple if you will that have special feelings for eachother.

You have to kiss your boyfriend or girlfriend

Technically scientists have proved that kisses burns calories but for you and your partner everyday should be national kissing day.
But stars say kissing every Friday is good for your mental health,so pucker up and have fun

On October 19th no matter how busy your schedule is you have to take time out of your day to hangout with your bf/gf

a shorter way of saying boyfriend/girlfriend

On the 5th-23rd December you have to go up to your crush/gf/bf and have a conversation with them.

A character or star you fall in love with while watching series or film.