This spellcaster has accomplished a miracle for you, really. He gave you your heart's desire. You got the outcome you were dreaming of. Now is not the time to be cheap. I would give him the best of whatever you have - be it money, your most prized handiwork, some service or skill from your trade or occupation, much home-cooking, vegetables, or livestock, etc.
If you were a middle-class to wealthy American, for instance, i would expect anywhere from $300 to $3000 payment for this type of spellwork - removing spellwork from a jealous woman, separating the two of them, and returning your lover to you ready to marry. This is serious work.
Hopefully your internet spell-caster is the real deal. Many, many, many of them are frauds who rip people off.