tell her that, flat out. be 100% honest. if she's willing to help support you because she wants this job opportunity and doesn't want to let go of the relationship, then go for it, and i'm sure you'll be able to find a job (retail always needs people). but if you don't tell her honestly how you feel, one or both of you is going to end up extremely unhappy if you go through with it and end up with issues down the line.