I give up

Im in an unhappy relationship and we have 2 kids together. I have no friends that even care to talk to me anymore. I had my kids young and they are starting careers and have no time for kids or me. I have no career going for me. Im lonely, fat, and miserable. My fiance is an absolute loser and will never get his life together. He has no patience with the kids and he never helps me. I feel like I have to do all the hard parts by myself. Why does God have to hate me so much?