Is AUTHOR wrong in the post ? POST : So me and my gf have been dating for 3 months now and things have been going real good. We're both at uni but I'm a full time student and she's a part time. I'm at campus from 6am-6pm every day of the week, plus doing 3 hours of extra self directed learning when I get home just to keep up and she'll have one 2 hour class for 3 days of the week, so our schedules are very different.  
I'm exhausted pretty much every night.

During the day we text, I tell her what I'm up to and what I've got install for the day, my classes I've got on etc etc.

I don't quite think she gets how busy and full on I am and how bloody exhausted I am when I finish my days. I warned her prior to starting the year that I'll be busy and full on and probably won't be able to text 24/7. She told me that was fine and she can handle that.

 I've been Skyping with her probably twice a week at the moment (since we live about an hour away) but now she wants to every night. I'm asleep by 9:30 pretty much every night and the times I'm honest with her and just say I'm too tired or take a raincheck she gets all passive agressive with me and I just don't have the energy to deal with it after a long day. 

I feel bad telling her no because she gets all pissy with me, but I feel like I also need to take care of myself. For example today, we Skyped from 7-8pm since I got all my shit done during the day to make the time for her. She then wanted to Skype later on but I told her I just needed to sleep since I have to get up at 5:30. 
The second I gently let her down (after already Skyping that day) I got shut down, she got all passive and just told me goodnight. 

I felt bad but sometimes I just need some time to myself to just relax. 

AITA here? Every time I even mention I'm somewhat tired it feels as though she takes offence from it. It annoys me and I don't know how to make her understand without her getting all upset. 



