The question is, is it love? Or is it infatuation? Or is it loneliness? Actually that's several questions. It's possible to love someone, leave them and reconsider your earlier decision. I would caution you to be extremely careful and analyze your reasons for having broken up in the past and wanting to get back together now. Has this person changed so much or have you changed? What happened to cause you to fall out of love? If you get back together, what will be different? If you can answer these questions satisfactorily and you and the other person are on the same page, I wish you all the love in the world. Just be aware of your motivations.