Is she has chosen to go for such class. She won't be single for long.Here's the root of her problem.
"I’ve never been chosen as a partner. I’m a little overweight, and sometimes I think that's the issue but I know that’s not true. There’s plenty of big girls, in happy, healthy relationships."
It's not a about big but a few issue I can see on hand :
1. Her own expectation of a partner
2. Her own expectation in a formal relationship,what role can she play ?
3. If she's given a role to play in a relationship, will she be happy to play that role willingly ? Will she be complaining that she earn better salary then her counterparts and she's unwilling to compromised? Society changing role ,can she able to take it ?
If all the matter can be sorted out, I think it will be easier for her to hook up.