Too soon. Don't preach, don't lecture, don't tell her how she hurts your feelings.

Possible responses:
Her: That was a long time ago
You: Isn't it great how good memories last? \:\)

Her: That was a long time ago
You: What do you mean when you say that?

Her: That was a long time ago
You: What do you mean? I was 22 then, and I'm just 25 now..aren't I??? At least, I FEEL 25!!!

Humor is always good. Positive Act As If is always good. Responding to her negativity with angst or negativity is not a good move.

Ellie