I do think her childhood will effect her throughout her life, if she lets it. I know the stuff I dealt with in my childhood, and it was a pretty idyllic childhood, have been things I've needed to work on as I get older. I think that's pretty normal.
But she's only 13 now, and growing up in the world today is hard. Add to that a sense of abandonment by her Mom, a broken heart, and being generally hormonal...well...I can only say to give her lots of love and consistency. She may not have a strong Mom in the picture, but she has a strong Step Mom who is looking out for her. Keep it up! ; )