I can't even imagine the pain you must feel over these rejections! If I might ask, where are you meeting these people?
Maybe I'm wrong, but you are going to have to date a lot of women to find someone willing to see past your inexperience. Think about this a moment from their point of view...most (not all of course) women in your age group don't want to be a "teacher", they want someone with experience. Someone who knows what they themselves like, and who knows how to go about pleasing someone else...which is not to say you don't have to learn what your partner likes, but you are comfortable already with sex and communication.
There are also women who are more selective and want someone who hasn't already been with everyone in their social circle! Get started on some of those "meet-up" sites for lesbians...go to activities, meet people who enjoy doing the same things you do without the pressure of one-on-one dates. Make some quality friends who can become more, or who knows somebody looking for a less experienced partner to build a life with.
Good luck to you...you are still young, and there are lots of women out there