will i be single forever

Though i consider myself to be a really funny, interesting person and also ok looking, I cant see myself finding anyone who would want me. Im a single mother with 2 children. one of my children has down syndrome and a terminal heart defect. I love my children and feel blessed everyday to have them however i could understand why a man would not want to take on such responsibility. I didnt choose to be a single mum, my sons father left me after having my son. Our relationship went down hill when I could not abort our child. will i be lonely for ever.