Wii makes some excellent points. I was going to say something similar last night ut I was too tired to write.
I'm concerned about her not having her kids. That's a huge red flag. I'm also wondering why your only real defence of her is that "your friends like her". Well - your friends aren't dating her. And friends only see what she portrays around them.
Anyway - I get the feeling that you already know that this one is over because of all the "ifs". It's easier to end it before it goes any further.
Hope things continue well with the girls and your school plans. Life is grand!
Barb Ambivilant is not enough, my friend. You want someone who really makes you feel "over the moon". And if there are red flags - I'd say - run, not walk away from this one.
You have a good plan regarding your education and related costs. Maybe you'll meet someone at school. That's an excellent place to look.