A Friend that I love and want to date turned into a lesbian but I can't let her go what do I do?

She didn't "turn into" a lesbian or "become" a lesbian. She discovered that she IS a lesbian, and most likely always has been just sometimes it takes people longer to figure that out. There is no way to turn her straight, could a gay man turn you gay so he could have you?!

You mentioned that you have confessed your feelings to her on a few occasions, surely these would have been enough chances for her to express how she feels about you? I think you need to accept that she is a lesbian, maybe you need to seriously talk to her about how you feel & give her a chance to clear up any doubts & hope about possibilities with her you might have.

She didn't choose to be lesbian
she IS lesbian and always WAS

If you REALLY love her, you'd understand her sexual preference

she CANNOT turn straight
they tried stuff like that in religious circles; outcome is quite poor

go back to Sudan