how can I see if I have black listed someone so they can't text me
Open Settings > Applications > Call > Call Rejection > Auto Rejection list
Check if she is there. Also check Settings > Blocking mode
Also, do you have any call and SMS blocking app? Maybe you accidentally added her there.
One of my friends can't get a text through to me, but she can call. I asked this question and was told to have her check her provider for problems - or I should check to see if I may have black listed her! How can I black list? - and how can I find out if she's black listed by some mistake?