you could call her. when you're together prove to her you're worth it, and would never hurt her.
couple simple spells could be a candle spell, but if she has trust issues, casting a spell on her might not be a good idea. if you want to cast spells, lighting a pink or red candle would be a good idea, but you should prove to her why you two belong together. if she already loves you, and it's a faith thing on her part, that's where the problem lies.