Ugh, Kit, I'm so sorry. You're right that it sounds like a bad romantic breakup--hopefully she won't be showing up at your door with roses! She's acting very unprofessionally. It's like she used receiving the books as an excuse to contact you again--she could have just sent them along to you without asking. Or simply texted and said "I received the books--do you want me to send them to you or should I return them to Amazon?"

And it's wrong that she said again how she doubts anyone will love you/carry you in their heart (basically the same thing) like she did. I'm sorry. It seems like she's trying to guilt trip you. If you haven't replied to this latest message, I'd either let it go without replying or reply and say you think it would be best to not have any additional contact while you focus on your current therapy. Or something like that. But I understand that would be difficult to do. So maybe just let this text be and don't respond to any others from her.

Hugs...