Allright... First time poster, long time lurker.
Your situation sounds exactly like my last relationship, which ended about 2 months ago. She is 24, had been in a few flings, STR's, etc. Never anything serious, so she was very inexperienced when it came to being in a LTR. Some things I learned myself about being with girls who are inexperienced with relationships:
1) They don't KNOW what they want, or what they are looking for long term. They may have a vague idea about what floats their boat, but you are part of the learning process for them. I think back myself on the first few yearlong relationships I had, and I definitely learned a lot about myself, and what I need in a woman/relationship. My views and needs changed with my knowledge, and I don't think women are any different. That's not to say that you won't get along, and that things don't have a chance long term, but you are definitely part of her learning process with regards to what goes on in a LTR.
2) It can be hard for them to transition from the "geting to know you" phase of a new relationship, to the "yeah I know everything about this person" phase. A lot of them just don't know that at a certain point most relationships get to a point where there's nothing left to learn about the other person, and at the end of the day you just have to be comfortable being around your significant other. Some people really thrive off the "getting to know you" phase of a relationship though, especially young women. Some always have to have a new person in their life, and are not comfortable with the "comfortable" phase of a relationship.
Now some people might say that you were just to boring or predictable for the girl, that you didn't let your DJ skills keep her on her toes, etc., etc. I'm not saying that you shouldn't be going out and having fun, taking trips, seeing places, being active. Relationships need those things to stay alive, because if you're at home every night eating potato chips and watching the Golden Girls, then yeah she's going to get bored and leave your ass. But even if you're an interesting guy, and have hobies and take your girl out, *SOME* girls still get bored because you're not the new guy.
3) Some girls who are inexperienced in LTR's just don't know how to treat a guy. They are used to going out on dates all the time, and having the guy pull all the stops to try and win their affection. But I think the street goes both ways here. At a certain point a guy likes to see a girl take some initiative into the relationship, and start reciprocating a bit. Even if it's little junk like making dinner once in a while, or doing the legwork to plan an evening out. At some point they have to stop sucking up everything the guy lays out to show her he's a good guy, and start showing that they themselves are going to be good girlfriends (or potential wife if that's what you're looking for). But hopefully she starts showing these things earlier than later, or you should probably plan on finding someone who will be a good girlfriend!
4) They don't really know what "love" is. They say the words, and they may think they feel it, but they are also inexperienced, so who knows if they are really feeling love. They could be feeling lust, or like, and not know the difference. Sometimes it takes a few STR/LTR's to really find out what "love" means to that individual person
As far as your case goes though, I have no tips for you on how to determine her commitment level. I do think it's somewhat odd though that you're thinking of moving for this woman, and she hasn't even told her parents, whom she lives with, that she's seeing you. I personally would place the "parents knowing about you" step before the "moving for a chick" step. I'd meet her parents first, as that's a big step for many people. If the parents end up not liking you, then moving your location may be a moot point. That, and her parents knowing about you, and liking you (unless she's looking to go out with the badboy that the parents hate), may show how commited she is.
OK those are just a few things I can think of. Go ahead and rip the newbie's post apart