A longtime "friend" has never invited me to her home in 15 years. She expects to be invited and to attend any social event I give. She says her home is too small or too cluttered. I accept her into ...
The answer could be complicated. Often sexually abused children put up a wall of protection around themselves and their private spaces. Having people inside their home feels intrusive to them, and they are very uncomfortable. Not everyone comes from such a well adjusted background. If you've been friends for 15 years, it is her friendship you enjoy, not her personal space. As her friend I think you should give her the benefit of the doubt and not press the issue.
The friend is probably a bad housekeeper.
Or she wants to just go to your house, maybe she is lazy