Is there true free will or are we simple subject to stronger desires?

Me and a friend have been debating this topic and I'm a little stumped I must say. My friend believes in Hard Determinism where desires control us and our desires come from what he calls "life path". I tried refuting this by saying free will and desires are distinct but he simply brought up that our strongest desires determine our free will. So if you use your free will to go against your strongest desire, then you are still using a stronger desire to over come another stronger desire if that makes sense. So after doing some research I stumbled upon libertarianism and it seems like that is the view point I gave to him about free will and desires being distinct. But I'm not sure if libertarianism is the Biblical explanation. So how does God explain free will and desires being distinct? Can we really choose to not follow our stronger desire without a stronger desire causing us to do so? If so, then why would we choose to do something we do not want to do unless the desire to do that thing is stronger than the desire to not do it?