How can romantic feelings being subdued/absent due to outside stress and mental turmoil be explained?

Have any of you had this experience? Heard of anyone else having this issue? I certainly have from friends/family and now firsthand experience.

I’m curious about the explanation or any information anyone could provide about this. My girlfriend is in a really bad spot mentally and so we took a break so she could right herself. She said she had no romantic feelings for me at the moment which hurt a little, but I know it’s because of external factors and that we were so close right before the tipping point. When all you feel is dread, pressure, negativity, and your mind collapsing, how could any positive feelings be present or the urge to be romantic?

Thank you. I appreciate any advice and insight and personal stories you may have about this. I’m trying to get through this difficult time personally and it will help greatly.