I am scared or not interested in dating, for various reasons. Is there something wrong with me?

I am divorced and have 2 children. I am 42 years old. I used to be thin, but I am currently overweight and trying to get back to being thin. I have bad experiences with men and it seems like alot of women I know have had bad experiences. I don't trust men and I don't trust myself to know if a guy is good or bad. I am very gullible. I am very insecure in my appearance because of my weight and feel like I don't deserve to be with a man. I feel like I don't know how to be with a man. There are so many other things that I could add as to why I'm either not interested or scared to date, but some are very personal.