<human>: Can you provide a brief overview of the text?

This is kind of an odd one, but here goes. My 21 year old girlfriend of almost 6 months requires very little sleep, usually 5 hours is a full night's sleep for her. I, on the other hand, require at least 6-7 hours on a regular basis to function. 

My girlfriend loves cuddling and hanging out, and doesn't usually mind too much when I fall asleep on her when we are just hanging out for the night (no sex until marriage relationship). However, since we are on a break from school currently and she lives 7 hours away from me, we are having to rely on phone calls and coordinated movie watchings while we are on the phone or skyping to hang out. 

I work while we are not in school, so right now I have to wake up at 8 every morning, meaning I usually try to get to sleep around 1 or 2 am at the absolute latest. She on the other hand prefers to stay up super late, often to 3 or 4 or 5 in the morning, and tries to get me to stay up late with her. I'm constantly feeling bad that I have to hang up and go to bed, and I usually end up staying up later than I should to avoid making her sad (she doesn't like to do anything alone, so she just lies in her room whenever I hang up but can't sleep), and the next day drinking more and more coffee to function at work. I've done this the past few nights, and I'm really starting to fry myself out but I don't know what to do. 

I don't want to make her feel like I'm abandoning her because I have to sleep, but I don't know what else to do. She has trouble understanding why sleep is so important to me because she doesn't need to do it as much herself, and I give in sometimes and try to fake being ok with caffeine. How do I get enough sleep myself without making either one of us feel like I'm abandoning her?
<bot>: I need more sleep than my girlfriend does, and so when I go to bed it makes both of us feel like I'm abandoning her, so instead I just don't sleep and now I'm starting to get really sleep deprived.