I agree with new guy.
She may be feeling lonely right now, and maybe she only wants your affections to feel 'full' again. The reason as to why this is BAD is because it could be selfish. She could be willing to make you think she likes you, just for the return of affection that makes her feel whole again.
In other words, you could be 'faking' it (the liking/loving towards you) to get the affection/attention from you.
By the way, this is the only letter I have read from you. So a lot of this is still very ambiguous to me (especially her msg).
"I still find each day too short for all the thoughts I want to think, all the walks I want to take, all the books I want to read, and all the friends I want to see."
- John Burroughs