Letting go of your life is much easier, if you judge your life unfilling or maybe in MC's case your existence as low value (Lower for example, than that of a girl you liked for a long time.) But if you finally succeeded after a long hard way, it's far harder to let go. Would he throw his company away for her? Would she ask him to do it for no good reason? I don't think, that was fair of her. MC did that in the spur of the moment. MC's friend didn't have a "opportunity" to do so (and to possibly fail. She just assumed he would). Well, at least he now knows, how that genie sees him. Sad, if you think about, how she might have came into existence in first place.
Then again, seeing him grabbing her that way, he seems to be a violent jackass.