Cold approached a girl today and during the interaction she mentioned that she was "lowkey a freshman" implying that she thought the age gap was too much.

My response was "yeah, you're probably too young for me." I thought it was better to frame it in a way that I am qualifying her (she is too young for me rather than I am too old for her.

Sure there are many girls who would have a hard age cut off. But let's say that she is on the fence and that the age difference is not an impassable obstacle - what is the optimal response in these situations?