Young women from troubled /abusive backgrounds have a limited sense of self worth.
The answer is not to tear them down for it, but build them up.
You don't know that her background was "abusive." But even if it was, the answer is not to "build her up." The answer is for her to build HERSELF up. No other person -- mother, father, week-old boyfriend -- is going to do it for her.
I don't think this kid deserved to get shot. But I don't have much sympathy for her either.