I'm going to be honest... even if you do somehow cast a love spell successfully you will have a lot more issues with her than not. Love spells don't work through an obvious mechanism. They usually work, in vague terms, through alteration of energies/expression, as far as I know. So, for example, if she is being haunted by insecurity and her mind is clouded, you casting a love spell to become more attractive to her will harm you both, badly. Why? Because her thoughts and likes are being distorted by the issues that haunt her. By asking that you become more appealing to her, now, you are asking to become more appealing to her mental illness also... because her issues are just broken parts of her. They can not be isolated so easily. Simply put: you would become more like someone that would fuel her issues in the present, rather than the partner she truly needs in her life.
She needs spiritual healing, yes, but not love spells. It'd be better to pray for her issues to get better.
Consider writing a little "spell" for her betterment instead. That is also prayer, and in a very broad sense a "spell born from love" - better than what most love spells are. Something that protects her from her demons should serve you well, if you care to attempt this.
"May her eyes see her own beauty,
may the light within her shine truly,
may the vermin squirm away from her heart" - stuff like that.
If her heart does truly love you still, but she feels as if she can not be with you due to what haunts her mind, then the shadows in her heart being lifted will help her return to you more than any love spell ever could. You will need to be consistent and pray with good intention, else it will not work very well. You must also have faith in both her and yourself.
She doesn't need to be steered towards you, she simply needs to have her wounds mended.