I am not receiving text messages from one android user.

I am not receiving text messages from one android user. I have can get them from other android users. I've turned off my phone, I've tried toggling the airplane mode, I have deleted all of the texts from her, I have removed her as a contact and added her back in. I have restarted my phone several times. I have checked and she's not blocked. Please help, if anyone knows what to do now. Thank you!