[ of course eren would focus on his pursuits... when mettaton meant strictly happiness found with mikasa, as happiness takes on many shades. one could be dissatisfied with life and circumstance, yet find somebody's company somewhere where they could find solace. and no matter what eren tells mettaton, he's decided that mikasa has significance to him somehow. even if she's the one harboring feelings, and he's the one turning her away.

looking that upset about it, that distant, and... following her around. yeah.

mettaton offers him a heart on his screen as he, too, backs from the table. ]

IF EVER YOU NEED HELP, ON THIS MATTER. I'D BE GLAD TO DO ASSIST. SO LONG AS IT IS IN BOTH OF YOUR INTERESTS.

[ nothing that would ultimately hurt mikasa, that's for sure! relationships hurt, they do; no reward without risk, after all. so he's not going to give that cliche line of "i refuse to hurt her," because love hurts, feelings hurt, relationships hurt, but the reward exists. so expressing that he'd do what's in their interests sounds better to him. ]

AND... TAKE CARE OF YOURSELF, DARLING. TREAT YOURSELF TO SOMETHING OTHER THAN SOME IDLE TEA!!

[ intentional treat, not treat-out-of-convenience-so-i-can-watch-mikasa. ]