I need to know.....seriously i need answers please?

ok im 25 years old. i have a 2 year old little boys and a soon to be 4 year old little boy. i am a single mother of my babies, there dad is NEVER around... nor will i ever be with him i nthis liifetime again..... after my youngest was born i had my tubes tied... because ido not want more children, because i do not want another baby daddy we can call it... but also for medical reasons.... what are my chances of finding a guy with the above cirstances..... i want a relationship, and one day get married.. but i have two children that are biologically not his and i can not carry a baby for him either..... am i going to be alone forever??