why do I feel guilty? is this normal? have you had this feeling before?

Im 31 years old girl, single. I have a very stressful job and there is always a fear of losing it compare to other jobs. for now I cant change it so I need stick to it. I dated someone couple of months ago and that was the worse ever. he brought the worse out of me. something I has never known I'd be capable of. terrible character. he was an alcoholic, not ambitious and not from a good family and no savings. Im coming from a very good family with values, im independent and always have goals and plans in my life and endeavor to reach them although I face lots of obstacles. After breaking up with him, I haven't been able to get over it. im over the person 100% but I keep feeling guilty of being with him in the first place. I keep thinking I had to leave him much sooner. but he made feel less valuable, less worthy. made me feel like Im not doing anything with my life. like im not successful, like im not special. he made me feel I don't deserve to be with someone that has family value that is always active and does stuff, even if they are expensive. he always took me to cheap places because he spent his money on alcohol. and I can afford the life I want and want to be with someone that is like me. im not a gold digger by the way. now I cant stop feeling bad and worried and that I might not be able to be with someone that makes me special. how to move on?