Contemplating on writing a letter to my "sperm donor" he kicked me out into the streets a week…

Contemplating on writing a letter to my "sperm donor" he kicked me out into the streets a week before I was to have my second daughter and didn't care if I had anywhere to go thankfully a man I was friends with took us in but I've known he was my real father since I was 8 but in the 14 years I yearned for a relationship with him and then when he kicked me he told me he hated me but he has no idea of the hate anger sadness and confusion he has stirred in me hopefully I'll get the nerve to be nice and polite but who knows