What does it mean if your partner says to you " I love you because you're mine?"
It could mean they feel possessive over you which, in measured quantities, is okay between two people who are affectionate about each other. If this however turns into an obsession, you should immediately end things with that person.
Well slavery is illegal so... Ill say it means they love you
One word: affection
hes a loving guy and is happy your in his life and that he has you and hes always happy to say your his because you make him happy