At least she was straight up and honest with you instead of biting her tongue and choking on her rage for months/years, all the while learning to resent and hate you and herself for letting it go for so long.
There are different reasons she might say that. Assume the best reason, unless there’s evidence against it.
My guess at a good reason: She knows you, and knows that if she gives you a hint you aren’t going to understand the hint, or maybe not even realize there WAS a hint. So she tells you the truth straight up.
If you can find a way to take this as “useful information without emotions”, does it help?
You were giving her the shits. Maybe try being goofy* again in a few weeks, and if it results in her telling you off again, desist with the goofy shit.
Or get a new girlfriend who likes you being goofy.
Either your gf is a complete basketcase and the sound of laughter makes her regret being with you or you are leaving something out. Can you define “acting goofy” a little more specifically?
She’s in phase 1 of rearranging your personality to suit herself. As a matter of fact she’s probably past phase 1 already, has she made you change what you wear or what you eat yet? Eventually she’ll change you into the person she’d be happy to be with right before she dumps you.
I think she was being honest with you that she doesn’t like you acting “goofy”. As for your response: “why do you got to be like that?” - you can’t tell her how she should feel. Well, obviously you can but you were implying there was something wrong with how she felt about something. She “got to be like that” because that’s how she actually feels. Would you rather she lie to you?
As to whether or not this is a deal killer… that’s up to you two.
You seem a little cagey about the nature of this ‘goofiness’, to be honest. Goofy implies silliness, which is rarely offensive, as a rule.
What exactly were you laughing at? What was in the pictures? What was the article about? They weren’t interpreted as random by her very likely. With more info we might actually be able to help you out, but you haven’t really given us much to go on.
But we all, I think, know the uncomfortable feeling of cringing over someone else’s behaviour. Few things are as uncomfortable as being embarrassed for someone else, in my opinion. Perhaps there was a little of that involved?
The real question is what are YOU gonna do about it?