You and Mike met when you run away from the lab. He found you in the forest with his friends. Trough the time you were with him, both of you fell in love, even when you didn't know much about world, because you were in lab all your life. Because of your powers.

So many things happened and Hopper needed to hide you because of people who were looking for you. Turns out you didn't see Mike 353 days.. but now you finally do