After i told her that i have a crush on her she laughed and told me she finds it funny because she had a crush on me back than (about 10 years ago). After an hour after she went home she texted me and after a while we talked about how she felt and she told me she was really flattered and nervous, because she kind of knew it all along but still wanted to know it from me. Since then (its about 1 week ago) nothing has changed. After the confession we met once and talked like nothing happened but she told me that her little sister ship us. I think based on her texts to me, she has no interests in me. And i am always the one who texts first or the one who asks to meet up.
Now i dont know if i should keep trying or just move on.
Since you understand that she is kind of keeping you as an option, you also take it casual and keep her as an option. There is nothing wrong in it. But dont bother too much over this since she is not giving you any signs whatsoever.