I would suggest that the former girlfriend is trying to bluff you into paying. I say this because her potential lawsuit is fraught with problems.

First, as you alluded to, she certainly may have a statute of limitations problem. That would depend, to some extent, on what state she filed the lawsuit in.

However, there are other problems as well.

Did the two of you have some written contract? I doubt it, in which case she would find it next to impossible to demonstrate any agreement to pay.

The presumption, with any couple, is that expenses are to be shared in whatever way you deem appropriate. Hypothetically, she made $100,000 per year and you made $20,000. It that case, it wouldn't be unexpected at all for her to pay the vast majority of the expenses. Absent a contract to the contrary, no court would order you to reimburse her for expenses she paid during the relationship.

I strongly suspect you've got nothing to fear, she's trying to scare you into paying.

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