It sounds like everybody involved hasn't quite transitioned to the new roles yet. It's a broader issue than just how it affects your love life. How is she going to live her life without making her own choices?
It's easy to say she should just tell her mom, but you shouldn't try to make that decision for her any more than her mom should decide who she dates. Encourage her, build her confidence, and suggest other ways she can assert her independence. If she can't jump right into asserting her right to decide who she dates, she may be able to work up to it by demonstrating she can make other adult decisions for herself.
If mom still does her laundry, she can start by doing her own laundry. A 19 year old should have no trouble doing their own cooking and cleaning, and these things can form a bit part of a mother's impression of maturity.