[35/F/Straight] Friend dumped me. [35?/F/Straight] Non romantic friendship.

Okay, so I am quite lost. Can't concentrate either and need to. My friend dumped me the other day. She stated the reason why she dumped me was because of a text that I wrote to her. Now I think that the text was totally innocent and non-offensive and quite frankly I don't know what in hell to think. So what was the offensive question? I asked her why did she tell me to go to a specific location to take care of something. Then I said I previously told her that it was too far and I didn't have the money. I didn't understand why she was telling me to do it when she knows my situation and she can figure out that it would be too much for me. And she dumped me. In fact we were due to go to the movies tomorrow to celebrate my birthday and she said no. I don't understand why she was offended. When she started to get upset, I said I hated texting because people misunderstand texts. She started texting something about her learning disability and that it wasn't her misunderstanding. I said people everywhere misunderstand texts it is nobody's fault. She started saying something about her learning disability and that's when I stopped reading her texts because they just didn't make sense in relation to that one question. Before this I thought we were pretty close. And then boom. I am pretty devastated. I just don't get it. Do any of you have any insight? I have no fear of her seeing this as she is not a Redditor, nor does she even like computers. I really cared about her and I did things for her and she just wrote me off in an instant. I don't understand.