with Kristi, it probably will never give you fruit or even bloom. But it sure is a pretty plant (or plants?)
It looks like there may be two plants in that pot. It looks great for a foliage plant but two in one pot? It's going to stunt both. As long as all you want is a foliage plant it might work and I wouldn't prune it at all, just keep doing what you're doing.
If you actually want to grow it for fruit, I think you'd need to separate them and plant in the ground. Guess that's not possible in New York state, huh? Grapefruit get to be big trees.
