I know I wasn't asked but had to add my .02......
I've never sent someone away for being too big. I've been honest and said no to getting fucked, because I liked having an intact sphincter muscle. But there's always something to do with a big, beautiful dick.
Basincreek: If that woman had cared about you, you would have made love together. If she said no, then she was not the right one, anyway.
I'd be wondering about some other things besides cock size (yours is just fine): From the woman's perspective, did your sexual advances come across as caring/loving or passion? Or was it a need you wanted to fill? We may all be misreading this but your original message did sound a little transactional (four months should = sex) so I wonder what message the woman that turned you down was getting from you?
Confidence is the sexiest thing for most of us.....a calm, confident (not cocky) guy will get laid if he wants to.