i can fix him
When a person thinks they can change someone who has no idea what respect means, just by saying 'I love you' and ignoring all the evidence that they're completely wrong.
'I can fix him. He just needs to stop cheating and stealing my money.'
'He was a good guy before he started doing drugs and yelling at the dog.'
'He cheated on me once. I can fix him. I fixed my brother.'