My Girlfriend thinks I don't care.

I've been dating this girl for about a year now and she has helped me through a very dark period in my life. Our relationship has always been very serious and i could see myself staying with her for a very long time. There has been a lot of strain on both ends, especially lately, because we go to school an hour and a half away from each other. She has family issues but it seems like every time something happens and I try to talk to her about it, she says she doesn't feel like it at the moment and so I drop the subject out of respect. She also complains often about the fact that she doesn't have many close friends at school and how I can't be there with her all the time. I always kind of dismissed the latter part as her missing me and trying to convince me to visit. I've tried to encourage her to go out and meet people (she's in a sorority so she should be able to) and I've always been supportive but she doesn't see that part. She thinks I only care about my problems and shes mad I haven't noticed how upset she is. Granted I have been dealing with a lot of issues lately with school and friends (one just broke up with is girlfriend of two years and has turned to me for advice and another is currently in the hospital). Maybe I haven't given her as much attention as she needs but I mean we talk everyday, often more than once. I feel like I shouldn't have to prove I'm here to listen. She should know by now she can come to me over anything. I understand girl's don't always show their emotions and leave out details but if this was such a big deal why wasn't it ever brought up sooner?

Anyways, this past week she started telling me she can't do this anymore and she needs to take a break for a couple of days to think about things. Obviously I''m confused and scared I may lose her, but once again I'm trying to be understanding and let her do what she feels like she has to so we can get through this.

If anyone has some sort of advice about how I can show her I DO care or how to approach the situation I would greatly appreciate it! I don't want to break up but I'm afraid it's going to happen if I don't do anything about it.

Thank you- Brad