What does it mean when a girl says “doesn’t matter”?

[MobySansei]

The girl I’m talking with was away for a few days and she messaged me to tell me she would be back on Thursday.
But I was busy on Thursday so I didn’t talk to her
On Friday she messaged me to say she waited for me to talk to her but I went missing.
I asked how she was doing and she just told me “doesn’t matter”.

I like this girl very much and trying not to seem too desperate so I take a more lay back approach.

[bomba78]

I guess you where a bit too much laid back there buddy. you have some sucking up to do.
she specifically told you whe was going to be back on day X. This should have been an indicator to you that she wanted to see you or talk to you at least.
you should have messaged, even if it was just to say that you are busy. A text takes a minute of your time. taking a dump takes longer than sending a text... so no excuse

My advide: quit the game playing and acting all mysterious and shit. Women pick up on it and it's never sexy.

[Anonymous]

"Doesn't matter" in this situation means you couldn't bother to talk to me when I got back so it doesn't matter how I feel cuz u were too busy.!! I'm girl-language.
Soooo I would guess she's hurt and you need to make it right with her.

[RunFatBoy]

Sounds like her feelings are hurt. Time to do some serious sucking up.