What she was telling you is that there was a lack of reciprocity, both in practical and emotional terms, in your friendship. A lack of reciprocity changes the balance of power. If the balance of power changes enough or too much, the friendship ends.
In my experience: the multiple times she has tried to tell you are, in themselves, warnings of the coming termination of the friendship if nothing changes. If nothing changes, the friendship will end soon as a result of that. Just because she is not talking about it still does not mean that it is not a problem. She has stated the problem and you offered no solutions. If there are no solutions enacted within a certain period of time, she will end the friendship. Since you did not participate in attempting to find a solution, and the lack of reciprocity is coming from you, she has left it up to you to solve yourself.