Struggling with alcoholic BD

My fiancé (or now hes just my BD) is an alcoholic & his addiction is the whole reason why we broke up.. Im stuggling with the situation. Im 18 years old with a 3 month old daughter. I dont have a job, car, i didnt even get to finish high school.. I live with my mom. I feel like a complete loser im breaking down over the fact that i dont know how im gonna to take care of my daughter. Im realizing i need to grow up.. Please give me some courage..