You're trapped in the Friend Zone. We see this here all the time. You want a girlfriend but she just wants a friend.
Maybe you could try to be original, and not just exactly like all the other Friend Zone guys... why don't you try dating other women while maintaining your hopeless and platonic friendship with your "friend?" You're not even really dating her, so this wouldn't be cheating. Just ask other women out, date them, and see what happens.
Good decisions come from experience. Experience comes from bad decisions.