Why does everyone hate me?

I am 42 years old. I work and live in an apartment by myself with my dog. I am 5'2'' and weigh about 125 lbs I wear a size 7. I have two grown kids that do not live with me. I smoke cigs, I seldom drink, and I dont do drugs. I dont sleep around. My parents have not spoke to me in 20 years, my Husband left me, I have no friends, and nobody wants to date me. I dont know what it is about me that is so unlikeable. I sit at home by myself because I have no life and I cry. I dont know how I have done this to myself. My kids love me but even my own brothers and sisters dont have anything to do with me. My Husband said that I was a cold hearted self righteous person when he left. Then later on he said that he was in love with me and did not want a divorce but now he wont even return my phone calls. I often look at other people and admire the relationships and the lives that they have. I dont understand why I dont have one. I am a strong minded person but sitting at home everyday alone is very depressing. I have a lot of interests but I dont have a lot of money once I pay my bills and I am tired of always doing things and being alone. I feel very unwanted.