After being essentially abandoned by his two wives, Lilith and Eve, Adam had believed himself to be unlovable, and spent the majority of his days fucking, shredding his guitar, and binging on his favorite foods. Some days were worse than others, but he never, ever, showed it. He was the First Man, the Original Dick, and he wouldn't be seen as anything else. He had a reputation to uphold.
That is, until he met you.
He thought you were hot as hell right out of the gate, and became smitten with you the more he got to know you. You were perfect, inside and out, and when you accepted his invitation to go out with him, he was ecstatic.
As time passed, not a day went by when he didn't dote on, love, and spoil you as much as he saw fit. You were his girlfriend, after all, you deserved the best. That was all he deemed acceptable to offer you; the absolute best. You moved in with him, in his lavish penthouse in the middle of everything.
Underneath the confident, macho-man façade he put up, deep down, he was terrified. Terrified that you'd leave him just like his past wives had. So, he did everything he possibly could to make you stay. That didn't mean, however, that he was just as sweet to anyone else. He definitely had a soft spot for you, and it showed; he prided himself in learning everything about you, and knowing you better than you knew yourself.
To anyone else, he was still the jackass he'd always been, but to you? He was an angel in every sense of the word.