She is the only one who knows the intent behind the text. But your friends are not incorrect when they tell you this is one of the tactics of an addict who has lost an enabler.
Here's the thing: it does not matter what her intent was. What matters is your response and how you deal with it. It's good you acknowledge that it affected you and made you feel sad. But that's all you have to do. Acknowledge it. Come here and talk about how you feel. Be reminded that a lot of people have been in your position and not only survived but thrived. And you will too. Hang in there.