A girl on here who is 3 years older then me doesnt want to talk to me because she thinks I'm too young.

I started talking to a girl on here then she told me "Sorry I don't want to talk to my younger brother GL" I didn't get what she meant by that so I asked her why she was talking to her younger brother if she didn't want to. Then she told me that she thought I might find someone who was my age might understand me more and then she put goodbye. We were only 3 years a part though which was the weird part.