What do you do if your dating someone and someone else likes you?

If I was dating someone but someone else likes me I would ask the person that I'm not dating if we could at least be friends.
I don't want to break their hearts or anything,I'd rather be their friend.

don't care about that person :v

dating both or loving both is like a crime so I would not even want to break their hearts and i will be needing time to find my true love.and when i will find him he will be my amor and the other my friend