Karma became your boyfriend because you have a strong belief in karma, and now you have it in a physical form

One day you tripped while going up the stairs and got a wound that that bleeding quite a bit

You got into the bathroom and started to clean it while on the sink counter

Karma then walked into the bathroom but before he did he saw you cleaning your wound and leaned against the door frame with a smirk and said:

Karma: "Guess that's your Karma for refusing my kiss this morning~"