I hate to say it, and I'm undoubtably proving I'm a bad doggy mommy, but our dane and both dobermans sleep in bed with us. They grew up that way.
Does she have her own bed? If not, get her a doggie bed, preferably off the floor to imitate your bed. The transition may be hard but feed her treats in her bed and get into her bed with her a few times and she may be OK.