When it comes down to it Nate, she is probably aware especially if you are sending text messages saying that you love her etc.
Either way there is either two options, she likes you back, but from what you have told the forum she seems to be the type of girl that would tell you, or give you an indication to make a move.
The other option is that she does know, but she doesn't feel the same way, either way you need to know, if its the second man, it will enable you to move on, no matter how intense your feelings are for this girl you still are only young, and if its not to be, then believe me you will look back upon this period and be able to laugh at it.
I would also suggest that you do talk to a guidance counsellor about it as Jordan had previously suggested, because I think you need a perspective upon this whole situation which you are not getting from on here.
Overall I could probably guarantee that everyone of us has liked someone and been in your situation, umming and erring about whether to make your feelings known.....its not unique, and good luck, but you really do need to do something about this, because it will not be healthy for you to continue in the way you are.