This depends on what is meant with "unrelated". Faith could be what ever you do, not what you want to do. I would argue that what your heart is telling you what to do, is your actual faith. So then as far as being a guide for your actions it is unrelated.
I often get the feeling that in religious discussions "faith" is often used to denote an ideal to be aimed at rather than the actual belief. As if faith is more a discussion regarding what is morally right according to "the rules" rather than what you actually believe is morally right.
Yes, every aspect of your life is connected with your faith. But that's not a question of opinion, that's simply a reality. You cannot chose not to be ruled by your faith, no matter how non-religious you might or might not be. "Faith" isn't a religious word. It's many times deeper than that. Religious discussions just include it a lot due to the nature of religion.