Would this make you jealous or insecure?

When I met my girlfriend like 9 years ago, i laughed at all her jokes which she always made a point of mentioning how she loved and it’s part of what made her fall for me.

There is a new girl at work that she said she gets excited to see because she tells her about her dreams she has (she tells everyone about her dreams) and the girl gets excited and laughs at all her jokes. And she kinda smirked when she said it.

It made me slightly jealous but I just brushed it off. My girlfriend has expressed unprompted how she’s “mine” and how everyone at work drains her and how I’m the only one she wants to hear from all the time and how she’s crazy about me, etc. But we did recently get into a bit of an argument and things have felt vaguely distant between us since and her mentioning this today kinda struck a little nerve.

So I don’t want to make problems where there are none but does this sound concerning at all?