That's hard-core... a roommate situation is a tricky one that brings out the absolute worst in two seemingly perfect people. Don't lie, you KNOW you share a good portion of the blame for what all went down between your roommate and you. And to top it off you air your dirty laundry with not only a perfect stranger, but someone who will be in the position to do something against your former roommate?
No I'm not your former room-mate, just someone who has lived in a dorm and had friends who have done the same.