If Mary doesn't want to give you the "20 miles, through the snow, uphill, both ways" lecture, I will
My commute to the dojo takes 1.5 hrs one way. Recently, getting back home means more like 2 hrs, courtesy of our ailing Metro. And I still make it to the training on average 5 times a week.
On the other hand, before I signed up, I though it was too far away. And even for a while after I signed up, I thought I'd only be going once a week.
So my advice to you is, if you really like that dojo, stick with it for a while, despite the commute. Maybe after some time the commute will stop being a problem