Hey there, wantanewme, looks like you're fairly new to PC so welcome.
First off, it doesn't really matter how 'good' you are. Literary agents are tough buggers to bag. I have a friend who is an incredibly gifted writer and couldn't get anyone to run her work (she was applying mostly to publications, etc) and now she's getting published all over the place after years of rejection letters. If you're serious about writing, don't give up, and what I would also suggest is a writing class. It doesn't have to be a university degree, or anything like that; but writing with other people, being exposed to different styles and different formats, and getting honest, constructive critiques on your work not only helps you become a better writer, but it helps you develop a thicker skin. Because again, no matter how 'good' you are, there's always someone out there (usually multiple someones) who will find fault in it.
Good luck!