<human>: My girlfriend and I work together, and recently she's been telling  everyone that she's gonna marry this other dude, lets say John(18m). John is known around our workplace to be very flirtatious and is constantly flirting with my girlfriend. 

 Now, my GF insists she's only joking even though I have made it clear that it bugs me that she says that stuff. I just try to tone it back, but today someone sent me a snapchat of her saying "Yup, I'm gonna marry John, sorry, itsyaboibiggyt"

 Immediately after I received that she sent a text saying "Please dont hate me for that lol!" I honestly can't tell if she's just playing with me, or if I'm reacting immaturely. Regardless it irks me, and I'm unsure of what I should do.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: > Girlfriend consistently telling me she's gonna marry a dude that flirts with her a lot. I'm unsure of what to do because it is clear that it bugs me.