It wouldn't really be a soulmate binding then, unless you mean you desire to bind something into being; i.e. you want to bind into being that you two will meet sooner next go around.
It could be as simple as you two performing a spell in which you state your intention to meet sooner in the next life, to as complex as performing a ritual that brings all the elements in, uses both sigils and seals, calls on gods, goddesses, spirits, spirit guides, ancestors, and your own souls to cause this to happen in the next life.
Since you both are into magic, I would cook something up together, and make it both of yours. It is what I did when I ritually married my man. :)