Because nobody wants to be with me for me. I wouldn't want to be with me! Also, if I was to choose anyone, I'd choose someone with a great personality AND a big dick. So even if I did have a great personality, I certainly understand guys turning me down because I don't fit the complete package. Guys are fickle. I know that. I'm one of them. So I entirely understand. I don't have to like it, but I understand.
Well all that makes it sound like you're jumping into the sack too quickly. I guess I get it, sex is fun. But, if you got to know a guy and he got to know you before you got naked together, trust me - he's not going to care if your cock is 3 inches or 13 inches. Because he's going to be happy to be experiencing intimacy with YOU, not with some guy attached to his favorite sized dick.