Women, in general, tend to seek stability more than anything else, so it is totally normal.
A couple of tips:
- To be realistic, you should always consider the worst-case scenario angle, so you can consider her an unexpected-situation-generator.
- You shouldn't be looking for validation but tough love. She is useful like that too!
- It is good that she is open about her concerns, so at least you see things coming, and you can "take the temperature" of the situation. My ex-girlfriend became resentful overnight, after some months of leaving my job (even having a 2 year runway). They can't help it...
Anyways, try to see the silver linings and don't let her down (much).