<human>: Alt because he knows my main.

Dan and I became friends in middle school.  When I came out  as a lesbian he said he would be my donor someday. My wife and I are ready for children. He is scared and changed his mind. We are totally okay with that.

Through his backing out, I realized there were a  lot of things I was willing to tolerate from Dan for his sperm. He is racist and sexist and just a jerk in a lot of ways. When he figured out my main username he told me and promised not to go through it. He did anyway and then asked me questions about things I had posted that I didn't wish to discuss with him. 

Between the huge breach of trust and the hatred, I see no reason to continue the friendship. I just don't want him to think it's because he backed out.

Could you distill the essence of the text into 1-3 sentences?
<bot>: sperm donor backed out and turns out to  e hateful; don't want him to think I hate him for backing out.