"You won't leave me, that threat is empty" he says, but inside he's terrified, you can't leave, he'd be lost without you "you love me too much to leave" he says, putting on his cocky facade

You know he's right, you won't leave him, you do love him too much. But you're determined to fix his behaviour, make him realise that what he has with you is special.

He's been away a lot, standing you up for dates, and now he's kissed another woman. And you refuse to be treated like that.