Hows a parent to open adult childs eyes to dead beat boyfriend?

He is 34, college grad, has not had a job for over one year. Was on unemployment and also went bankrupt. She is 21 and in her last year of undergrad. This guy is going no where! He is too old. Has nothing to offer. No job, no home, nothing to show for his 34 years. She can't see the hardships involved that a future with this guy will bring. We are helping her through college and had planned to for her Masters. But not if they are together. She has had little experience in adult relationships. Didn't date much in high school.She is not a happy person, Gaining close to 40 lbs. Dresses and looks like an old maid. Her extent ed family doesn't think much of him.How do we help her see?