"I told you, I'd never let you go."

You two were in the Batcave after he saved you from the Joker. He was supposed to be dead, that's what the police reports said. You'd looked them over a million times, not wanting to let him go.

But now, here he was, patching up your wounds.

He'd always been quite protective, promising he'd never let you go. Your relationship had been complicated, you'd met at a day job, revealed your identities to each other, and then were basically dating - but not officially.

He would never tell anyone about your relationship, so you broke up with him and had been on bad terms. Then, he 'died.'

You were devastated without giving a goodbye, and had dealt with the guilt up until now.