My girlfriend randomly has these days where she shows little to no interest in me, barely texts back, literally acts like we are strangers and won't even try to keep a conversation going. Sometimes I'll ask how her day is and she responds with one or two words and just silence after that, not even asking about me. I ask her if everything is okay and she says of course, why wouldn't it be. Most of the time our relationship is great and for that reason I don't intend on ending things with her. I have questioned her in the past and the result was always her making me feel like I was being naggy and over analyzing. It is really important that I call her out for her ridiculous behavior otherwise she will never change, but if I come across as a naggy, complaining beta-male, I will have done more harm than good. What is the solution here?