I apologise for my previous post - I only read your post , not your signature
What kinds of things have you tried so far?
I tend to "use" my mania to get things done - put all my energy , anger and racing thoughts in a big ball and throw myself into something like cleaning or a big project.
Maybe some strenuous exercise would help - something fast like squash , a treadmill , martial arts.
I find rather than being able to "control" the mania it's more a case of learning to ride the wave instead of getting drowned - trying to use it for productive purposes.
It's great that you've got such a good BF who helps you.
Take care ,