sucks you broke up and still have feelings for her, but you broke up for a reason. we know nothing about the situation, if she broke up with you, it means she wasn't happy, if you broke up with her, sorry to say she's moved on and perhaps what you feel is jealousy, wanting what you can't have sort of thing.
this is no emergency, it's just a crappy situation for you. try talking to her. you could try spells, but you're forcing your will onto her, if the spell works she'll return but not because she loves you, but because you cast on her.
it sucks but this is life, try to get her back, but if she's happy and you really do care about her, you should be happy for her.