Should I keep building a future or move away from her?

I have been with my girl for 6 months now, although it feels like years. We started out hot and heavy and really into each other but the last month has been different. We talk about the future a lot like we are gonna be together. We are going to be working together this spring and summer, I take her up to school (2 hours away) for a class she had to take to graduate and couldn't make on her own, and we do everything together. She has stated from the start that she didn't really know what she wanted but I thought that would have changed by now considering how invested we both are in each other. I've tried talking to her about it many times but the conversation just doesn't go anywhere. I'm absolutely crazy about this girl and am thinking about moving in with her in the fall. I take really good care of her and do everything I can for her (cook her dinner, pack her lunch, help her with school, drive her to work, drive her to school, buy her things she needs, etc.), but if she isn't 100 percent into this relationship I don't know what to do. She doesn't do as much for me in that aspect but is focused on school and work right now and does what she can (when we got together she was on summer break). It seems like she takes things for granted a lot and doesn't like me that much but she is not great at showing emotion or appreciation, it's just part of who she is. We met by a very rare coincidence and her secret code she's had for years happened to be my birthday and there are lots of other signs that tell me she is the one I'm supposed to be with. I don't know how to show her I'm the guy for her apart from being the best I've been to her (We haven't had sex because we are not in love yet and she doesn't want to). I respect her, do everything for her, make her life better in every way, and treat her like a princess and she still doesn't give me a sign she wants me seriously, what does this mean?