Should I wait or move on?

[Anonymous]

My girlfriend and I had an argument about something and at the end of the argument she told me she needs some time to think and she will let me know when she’s ready to talk. It has been a week since then and I don’t know if I should wait for her to reach out or move on.

[quaranta]

If she needed time to think without talking, I assume the argument unsettled her really really a lot. We don't know the reason behind, but she told you at least the reason for her silence in advance: she needs to process what happened, probably doing her considerations about the conclusions you got from the argument, maybe she is fighting her feelings vs what she discovered of you that unsettled her so much.
If she told you in advance that she needed time, though, it means she predicted she wouldn't be comfortable in talking to you soon, so a week is quite likely a time to pass to let her process it. For sure she didn't "forget" about you, rather she needs time to think about you and the argument you had, I guess.
If the problem was so bad I assume you'll have to discuss this thing again, if you continue the relationship, to solve it, because it won't simply fade or solve by itself I think.
Either way I think after a week you could reach out, to check what are her feelings and her status at the moment. You could ask her:"It's been a week, I reasoned about our argument too, I wonder how do you feel about me now?", to test the waters and get what her position is. If she ghosts you, it probably means she needs more time away from you and is still scared/disturbed, so if that's the case I'd move on then.

[Anonymous]

I would reach out and just tell her that you can understand needing time to think, but going awol for a week when you’re in a relationship just doesn’t work. I don't know if this is her way of breaking up without being direct, but she needs to let you know what’s up so that you can act accordingly. If she says she doesn’t know, then to me that would be my cue to end it, because indecision is a decision. The best route at this point would be working through it together as a couple, or hanging it up and being single.

[GallopAcrossEurope]

It really depends on the reason why you were fighting, but if a week passed by and she still didn't respond, you simply didn't come to her mind after and she doesn't seem to want or care enough to resolve any issues with you. Text her, and if she stalls for another week, that will let you know she doesn't care which is enough of a reason to move on.

[Circlesgames]

This too as well, but know its not easy, but hold on try doing other things

[Aerolyn]

Move on.