I often ask myself when a question is big, important, life changing, what does my heart want, what does my head think and what does my gut intuit.
The reality is, the heart should rule.
If you want to be happy, no other answer works. Happiness is following your heart, using your head to make that work and letting your gut cover the small details.
The head is required to avoid stupid moves, but it should never over rule the heart on a base level. Let it guide, give wise council and avoid pit-falls, but when it drives the car, you take the highway and miss all the good stuff.
The gut is like the head, only instinctive. Instinct and reason are a good, if often combative pair. A choice is always good when your heart guides you, your gut says “yes”, your head says “what he said”. If there is no cohesion here, the heart may want what it cannot have, but if possible, you still need to keep it in the picture.