I hate people who try to take credit for an immense change in another person.
Like, a guy who changes his entire personality, stops drinking and whoring around. Then his girlfriend tells him "You're only a better person because of me". That's so much bullshit.

Sure the girlfriend helped the process, but saying he's her creation is unfair and selfish. A person becomes a better human being by his/her own will, othrewise it's not enitrely changing...it's just faking it.

Having a loving friend helps the "cocoon" process and makes things easier, but I would never take credit for the ending result.
I believe there's good in everyone it's just not as visible as it should be. So when that person turns their self around, it was entirely their own doing.