When a girl says she can’t hang out because of “dinner plans” should I just assume she’s going on date w/ someone else?

So I’ve been been chatting back and forth with a young woman (who I’ve met in person 2 years ago) about meeting up. I’ve been busy traveling and she’s been busy with work. I’m actually leaving the country for a few months next week. I asked her if she like to hang out.

Our earlier messages hinted around about doing a tryst on the DL. She’s 24 and I’m in my late 30s. She said wanted to meet up but keep it a secret which I’m fine with. We both know lots of the same people.

But I recently asked her if she would like to meet up before we leave. She said she had “dinner plans” tomorrow night. Sounds like she has a date with someone else.

I don’t care if she’s going on other dates. Doesn’t surprise me at all. But I just want to avoid being the back burner given I’m a gentleman and we never agreed to friendzone bs. I don’t want to meet up with her (I planned on making her dinner) just to “talk” when we already hinted around about doing more than that.

Now if she ultimately doesn’t want to that’s totally fine. I’m mature enough to respect. But I get a bad a feeling she just likes the side attention in giving her.

If I wasn’t leaving for a long time I just would of gone quiet. Wait for her to message me first. But I was hoping to meet up before I leave.
Updates
+1 y
UPDATE: We hung out and went the full 9 years last evening. Turned out better than I expected.
Updates
+1 y
9 yards
When a girl says she can’t hang out because of “dinner plans” should I just assume she’s going on date w/ someone else?
Post Opinion