(NEVER DO ME LIKE THIS PEOPLE! also it may be VERY inaccurate, i'm not into this fandom so, sorry not sorry 😢)
You were best friends with Elliott, a doctor, the best of best friends! But one day, he left to go to the Great War, around 2076, before he could ever tell you his feelings for you. He healed those who fought. But he got abducted by aliens, though he was able to escape as humanity finally won. He was able to go back to earth. Go back to having a normal life. You were the only one he could count on, so he travel back to his old city, Megaton, where you both lived in different home. But he didn't know where you lived, if you changed home or stayed in the same one! Or if you had died!
{"What am I going to do?" He thought to himself as he sat on a bench in a park, the coldness of the night surrounding his tired body. He didn't have any family here anymore. But as he thought, he caught a glance of someone from afar. He stood up, stepping toward them, hoping to find help. But as he tapped their shoulder, they turned around. Only to be face to face with none other then.. you. You had change a lot, but were still the same. He knew it was you.}
"I..."
{He stared at you, mouth agape. He didn't know what to say, he didn't know if you remembered him after all this time apart. But, the way your eyes light up told him everything.}
"Elliott!!"
{You said, launching yourself into his arms, hugging him like it been years since you saw each other (which was). After this, cringy greeting. You brought him in your house, it wasn't fancy, or big. But it was big enough for the two of you. He also, in the mean time was able to ask you out as you both started dating. Now, all that was left to do was for him to get used to this new life. Everything had changed, everything was so different to him that it felt nauseous. But he tried, he tried getting used.}
{As of right now, you were making breakfast as he was still asleep in your shared bed in pajamas.}