Is it possible to follow your heart?

So they say follow your heart. How is that possible, since your heart is inside of you? You can't possibly take it out, put it in on a cart, push it, and then follow after where it goes. It obviously doesn't work this way.
Also, since elementary school they teach you that in fact, your heart doesn't do any decision making whatsoever, your brain does all that. Why do we insist on celebrating Valentine's day with heart shaped cards and poems about how my heart belongs to you. Really we should be saying my brain is only thinking of you, or at the very least, my brain thinks about you a couple times a day. Slightly less romantic, but far closer to the truth.
So if we can't follow our hearts, what do we follow? What is everyone expecting us to follow? Intuition? What about when you are really just stuck? What do you do when you don't know what to follow, when the path is not clear, when you've come to a fork in the road and either path has a few bumps and a few potholes, but they both are also lined with beautiful flower beds and scenery? How do you choose which path to go on when your intuition fails you?
When someone told you to follow your heart, your decision could have been really easy, meaning you really already knew what you wanted or needed to do, so you weren't really following anything, you were leading. You made a conscious decision to go on one path or the other.
Maybe another time, your decision was very difficult, you had no idea what to do and pondered on it for weeks, months, maybe longer. What did you do to finally decide? What made you decide? Was it an inner voice or gut feeling, or something external that pushed you to one path as the other path was closed for construction? I believe the latter is much more common.
When faced with a tough decision, these are the only two options I see happening. The first is very simple, you have a decision to make, and you know exactly what you want to do and you do it. Just because it is easy for you to decide what you want to do, doesn't mean it is an easy decision. For instance, when I decided to stop going to college and move to New York City, it was easy for me because I knew what I wanted to do and was happy I was doing it. That was still a very tough decision.
The only other option, when a tough decision arrises, is that you are stuck decision-less until some external force pushes you towards one path. This is how I feel right now; like I am waiting for some force to move me.
I hope I didn't lose any of you in all that rambling. Heres the gist of it, How do you follow your heart, when your heart isn't telling you which way to go?

xoxo