You can pinch off the flowers of the mint. It will keep it from spreading. Best to do this in late evening when the bees have gone to bed. Your mint will be fuller after pinching too.
Just a note about the bees when they're visiting your flowers. I work in the garden with the bees all around and find they don't bother me if I don't bother them. They're so busy doing their pollen gathering that they don't mind my presence. They're good pollinators in the garden.