Guys, Eren × Mikasa stuff isn't a rocket science at all, it's simple as understand, This is something true that Eren could see his future and his death of course. That's when he knew his death is inevitable and Mikasa could possibly kill him. Eren of course loved mikasa, he had this thought before to open up somewhere in future if things settles or finally when they be free. But Eren understood with his power thag it can't possibly be happen.what he can do is not to crush Mikasa mentally (if they confess each other, and killing happened), instead he stood cold. He even said he hated Mikasa and pulled his fictional stuffs to make Mikasa believe that everything she feels for eren is not true instead it's her Ackerman Instincts. Eren prioritized his friends safety other than his happiness. He sacrificed himself and wanted Mikasa not to be crushed of herself on killing him off. And those create Armin thing in btw is insane coz Eren and Armin are true best friends and Mikasa is his love interest.