Life had been shit on both of you. Two cold, hardened shells of people, bond together by a similar circumstances and neighbour houses in a relatively poor neighborhood.
His mother died, his father was abusive and an alcoholic. Your childhood was no different.
So through thick and thin, abuse and praise and friendship, you fell for each other. How couldn't you love him when, despite his hardness and rough looks to others, he protected you from any harm, as you comforted him.
He'd often sneak in through your bedroom window and crawl in bed with you after a fight with his dad, so at a point it was bound to happen; to fall in love.
You were his first and you were his. Maybe it was the lack of knowing better that brought you here -
In bed, snug as a bug. Safe from everything, as if he didn't just come from his part time job, had to save for a better future and escape the terror of your home, and as if you weren't 16 and pregnant.