I had a similar experience with a long-time friend, who didn't answer my emails or texts for a while. Then I found out that his geographic region was clouded in smoke from the fires out west.

It is very possible that your friend is dealing with something. It's a difficult time right now overall, and especially on the west coast with all the fires. If this friend has been generally responsive to you over the years, I would not let these few recent instances to sway you into thinking that the friendship must end? That seems a bit extreme, especially given the closeness in contact you've had over the years.

Perhaps in a few days, reach out again and ask if she is ok. Maybe express that you were hurt by the lack of response, but I would ask if something had happened, first, and see if she is OK, first.

Good friends are hard to come by. If this person has generally been a good friend, my advice is not to cut ties. College friends can be some of the most important friendships we keep.