I know of a woman who is very Sub and seems desperate to find a dom lover but she continues to have bad experiences because she is jumping into situations too fast. She refuses to listen to my advice and continues this cycle.

So as stated above, don't worry so much about "defining" yourself as a "sub" looking for a "dom". Instead look for PEOPLE with the "traits" you find appealing, "Alpha Male" types, get to know them and build some trust and THEN begin experimenting with where on the Sub/Dom scale you both sit. Having someone submit to you is a privilege and a responsibility, and it can be very dangerous and damaging for a sub to do so with the wrong person too soon.
Find local groups or clubs, or even regional message boards and begins reading and discussing topics that turn you on or interest you, the more you know the safer you will be and the more fun you will have!