“You can’t choose who you fall in love with. “
God help this idiot girl.
God help idiot Ron. This girl is going to come out in the end with just fine with a nice chunk of (what's left of) Ron's fortune to ease her suffering.

“You cant choose who you fall in love with. ”
Arguably, that is correct.
Falling in love (’in lust’ may be more accurate) is one thing. Acting on that is quite another.