How do you feel about the fact that I've been dating someone underaged for a while now?
Are you kidding me? Why would you want to date a minor?
I'm extremely insecure about who I am as a person.
Insecurity is no excuse for doing something wrong like dating who is not of age. Drop the relationship and find someone that can enter into a mature, loving partnership.
But I love him.
Regardless of love, it would be considered rape by law if you were to do anything sexual with this child. You need to stop dating someone under the age of consent or else you'll go to jail.