Regarding writing, I've been needing to let this out for some time about the one I see. One time not that long ago, I texted her a sort of woe is me thing where I used the word "loser." When she responded, she spelled it "looser." It really bothered me. In fact, I was so bothered that I felt compelled to respond and use the correct spelling again to give her a chance to redeem herself. Unfortunately, she again spelled "loser" as "looser." I'm not sure if it bothered me more that she was misspelling it or that she must have thought I was the one who didn't know how to spell.
Anyway, I tried to be thankful that she gave me not one but two responses. I was just kind of distracted by the error...
Also, one time recently she called me Suzanne. That has nothing to do with anything, it was just a random gripe that entered my mind to share.
Sorry, I don't know the answer about if therapy can help you. I wish there was a straightforward answer.