Feelings are fragile things, they hurt and break easily! Your feelings are a direct path to your ego, and I'm not going to lie and say you don't have an ego, we all do, accept it, you can be hurt by what people say. But the goal of a code review is NOT a slagging match to see who knows the most clever way to do something, it's a means to understand how tho code (at this point is a separate person who we all hate) could be better at doing what ever it is it's meant to do.
So beat up your code, accept the promise that the person tearing up your code, means we'll, the more they tear, the more they mean well, and yes it's mean but it's the code that's getting a beating, not you.
Unless you are the CEO, your code is not "your code" it's company property, so for the betterment of everyone take everything as if it where a complement.