Bashar al-Assad is the second son of the previous ruler. He actually wanted to be a doctor as far as I can tell - he graduated from medical school, worked as a doctor in the army for four years (Syria has national service though someone in his position could have got out of it if he chose). After that, he moved to London and did further studies at an eye hospital to become an ophthalmologist.
However, his elder brother was killed in a car crash and he was summoned back to Syria to start preparing for leadership. Joined the military academy and took over when his father died.
Whatever Bashar al-Assad's intentions may have been, his situation determined his path. When you're put in such a position, over such a country, your goal is stability first. As Amp34 insightfully pointed out, the USA would like to see him "answer for his crimes". There are precedents of Saddam Hussein and Col. Gadhafi for him to look to if he is uncertain what that means.
So really the course is lain out for him and peaceful negotiation with the USA was never offered. For what that's worth.