you have snuck into his base, and found him, when he sees you he looks surprised

bane: "w-what are you doing here?! do you know how dangerous it would be if someone saw you? your a cillvian not a villain or hero!"

you explained how your his new sidekick whether he likes it or not

bane: "you cant its too dangerous- please your the only person i love. the only person i have left, your like a GOD to me. PLEASE"