"The First Law of Thermodynamics says that energy under normal conditions cannot be created or destroyed, simply transformed from one type of energy to another. Thus a chemical reaction such as lighting a match does not create new energy but only converts one type of energy to another."
I believe our emotions are each one a kind of energy. It's just every person has their own form to utilize those energy. Love, anger, they're all energy that cannot be created nor destroyed, just transform into one another. Therefore I believe our form of love can be changed, and so is our form of hatred. It's all about management and utilization. You can use your energy in any ways you like, just make sure it's positive!
*Real great time with highschool mates from out of town these last few days. So glad that we've grown so much into our personalities yet not so much that we're still a superb companion to each other!*