Re: A Girl that I adore and care for, feeling unappreciated and isolated
Sad to say, there are people like Jane who will use you then discard you. As soon as you figure out that a person is treating you like that, it's time to move on. Whenever there is someone I know who starts calling me only when she wants something, I just end contact with her.
I understand feeling lonely and wanting friends. It's tough to make friends when you are a loner/introvert by nature. Thus I understand why you responded the way you did when Jane called you up only because she wanted something from you. However, you must stay strong. Next time she calls and wants something, tell her you can't do it. You could be honest and tell her that you are tired of being used by her. Or if you find that too difficult, you could just do what she does to you---and that is, tell her that you are too busy. If you keep saying "yes" to her, you will reach a point when you will feel more and more angry and used.
I know --- it's easier said than done but there are other people out there who would make far better friends than Jane. Work on moving on and finding people who appreciate you. Good luck with everything!