I don't think you sound crazy, you sound like you don't have much respect for yourself, and you should have more for sure. You took on a sponsor so she could be there when you needed someone. Everyone has a time in their lives where they need someone, and for someone with an addiction issue, wanting a person who is dedicated to being there doesn't make you some sort of crazy clingy boyfriend/girlfriend, it is normal.
It really sounds to me like this person isn't fulfilling her role as a sponsor. Maybe her circumstances don't allow her to be the sponsor she should be, maybe she isn't honouring the commitment. I don't know enough about situation but maybe a sponsor who is in a better position to be there when you need to is in order.