How to get a girl that prefers to stay single for years to come?

it depends how old is that girl. If she is 18, then you have to wait at least 10 years for her to change her mind. If she is 28, you might also wait another 10 years. If she is 38, she is pretty much given up that's why she wanted to stay single forever, so your chance to a 38-year old is pretty high.

Just show your passion to her. Nothing need to be fancy, sincerity is the key. Women are simple, all they need is someone who is trustable.

Are you asking how to get her to go somewhere with you or how to make her have an orgasm?