About a month ago I began having interests in a coworker of mine. We've spent quite of bit of time together but haven't gone on any official dates. She seems like such a great girl... but she insists that I'd be better off not having a relationship with her. She's disclosed to me a number of pyschological disorders and incidents from her past, including some problems with intimacy in prior relationships. From my understanding, she feels that she's been abandoned all her life. While I understand that may cause her to be hesitant and prejudice about starting a new relationship, I'm not really turned away at all... I've tried my best to assure her that I wouldn't leave her due to her past, and that my philosophy on dating doesn't require sex or even more than a kiss, and that I wouldn't make her do anything she wasn't comfortable with.

So I guess my questions are:
1) is there a different approach I should be taking?
2) am I wrong for even considering a relationship with her
3) should I just wait it out, and hope that our friendship transitions into something bigger on it's own?