Head vs Heart

The age-old question is still left unanswered. I know it's a case-to-case basis. There are times it's better to use the head; sometimes we're told to follow our hearts. Or maybe there can be a balance. But it's just one of those times that I am confused and don't know what it should be. I'm trying to find that balance but haven't found it yet. I just pray that I find the answers soon and make the right decisions.