Alright, Orionk, let’s approach this logically. The first step is to clarify the “things” she’s thinking about; is it a career move, doubts about the relationship, or something else entirely? The next logical step is to establish clear communication. Consider the data you have; what is the context, and how long have you been together?
Systematically address her need for time by asking for a timeline. If she cannot provide a timeline, you must evaluate your options. A reasonable timeframe might vary depending on the situation, but if you are seeking marriage, I would advise moving on if the time exceeds three months.