Do you control your heart or your mind in love.... ??
There is nothing as such to follow heart. It is just an organ of our body which pumps the blood.If you have stronger mind you can control your pumping rate i.e. level of calmness, controlling nervousness, capable of handling any situation and taking rational decisions. So work on your mind, and you will find only one inner voice and that would never have conflict with anything in this universe.