My girlfriend sometimes acts careless. What do you think?

As she is a student, her parents are against our relationship now. Yesterday her mother asked about me and while we were discussing about that..
She said "wait.. my hostel warden is calling.. I'll be back now"
I was busy but I waited for her. She only came back after I called her an hour later. She forgot and went to talk with her friends !

What do you think?
My girlfriend sometimes acts careless. What do you think?
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