Well, I am gay and not lesbian but here's my advice: only date people who are out in the community. I think when someone's says they are really not sure that that may be a polite way of breaking up rather than indicating they are confused about their sexuality. Take the hint and move on. I know that breaking up hurts but, do you know what is worse? Being in love with someone who does not share or return your feelings. Hang in there and keep looking for Ms. Right!