No, I was blandly serious, and she knew it.
Did you ask her to go to something that was not her idea of a good time?
Nope.
Is the exact phrasing of her question relevant?
Is the exact phrasing of your reply relevant?
Did your reply mention your ex?
All these years later, I can’t even recall the exact phrasing. So, no, I don’t suppose it turns on wordplay; things would’ve presumably played out the same way with, uh, synonyms all around.
Well. she indirectly referenced my ex: by pointing out that said ex and I had, well, just broken up, or else it wouldn’t make a ton of sense to talk about me going out on a date with anyone else.
And, carrying on with the indirectness, I replied by likewise referencing the breakup without actually mentioning the ex.
Did she ask in such a way that she meant a date with her and you didn’t take it that way?
(e.g. “Are you ready to date?” “No”)
She wasn’t asking in general terms, or hypothetical ones; she, in particular, was making clear to this here guy in particular that, if I’d like to go on “a date” at a particular time of my choosing, on a particular day of my choosing, then it was understood that a direct result of me accepting would involve then narrowing things down to a specific set of particulars — because if ‘dinner and a movie’ was going to be the particular date, well, that’d presumably require selecting a particular restaurant and a particular film to be enjoyed with the particular young woman who, I was being told right then, had been wanting to go out with me for a while.