Tips on helping my relationship reach spiritual potential?

I’m 22. In short- my girlfriend and I bicker too much because she is emotionally scarred by her father. Usually that is THE red flag but she truly is an inherently caring, funny, and smart girl. She has stuck with me for over a year despite my faults, the mistakes I’ve made, and my indecisiveness. Only recently have I woken up to what is important; I guess I could say I’ve reformed. She is happy for me, but is having trouble because, in the last 10 years, she watched her father go downhill. He was talented and successful in the early years, but due to a crippling injury, he turned to drugs and ultimately took his own life about 6 months ago. I’ve been improving my life exponentially, and I want to take her by the hand and take her with me to the stars, but she has this mental injury holding her back. I’d love to get her in therapy but she doesn’t seem to want to face the issue, and I won’t force her. How do I help her deal with the negative attitude fostered by her father’s mania and encourage her to seek her potential? I only want the best for her. I want to bring balance to our relationship if possible. Please help me help the one person who I can’t seem to reach.