I'm a mother of two a little older than your daughter and they're students too and they're not living near me either. It's difficult!

Is there any way you can go visit her?

The problem with distance is that you can't see her face to face. You can't read her face and see how she is really doing. It's a dilemma really. Do we hover? Do we give space?

Under your circumstances, and if I was physically and financially able to do so, I'd go visit even just for a weekend to see how she's really doing.

As she is depressed she may be purposefully shutting you out, but if you allow her to shut you out then it will become more difficult in the days and months and years to come to get back that real connection. She's maybe not just shutting you out, but all those close to her? I don't know. That's a huge warning sign to me that things are not right with my two... when they shut down communication for whatever reason.

Not sure if any of that will make sense to you, but it's a situation I think more parents than not go through at some time with their children. I don't mean the attempted suicide, I mean the distance. Not just in miles but emotionally as well.