Laurie I am sorry to hear that. I have only one input and suggestion: to tell her how you feel.

My daughter demonstrated similar behavior for some period (don’t recall how long, probably a year) in her first year of college, she became rather distant and all of a sudden short and not affectionate with me. Same as you I am close to her and we typically talk daily, she is also a very affectionate person. I recall that I was very upset at the time. What I did was telling her exactly how I fell. I couldn’t say in person at the moment so I sent email. I told her how her behavior makes me feel and if there is anything going etc etc it wasn’t accusatory but just explaining my feelings (she is my only child).

I don’t recall all the moment what exactly she said in her reply as it was over 10 years ago but her behavior with me returned to normal shortly after. Main jist was stress and also she felt I was not very understanding of her stress, which was likely true.

Does she know how this makes you feel?