Crying and being tired.

Nowadays I cry a lot... When I come home, I turn on my computer, and when I open Google Chrome, it automatically starts facebook, and my eyes always reach for Nicola... Then I mostly turn on sad music, and then I just start crying, and once I start, I can't stop. It feels as if I could just cry a river, very easily. How can there still be tears left now?
Also, I'm really tired. I don't really know why, because I had vacation one week ago, so I could just sleep well and I mostly woke up at 7 AM, because I got used to that, and I didn't mind. But now, I'm just super tired and I really have to try hard to get myself up to go to the toilet and to change my clothes. When I start eating it's all fine, and after that I go upstairs to do a few more things and then at 8 AM I leave for school, and at school, the first 2 hours it's almost impossible for me to concentrate, then the 3rd hour it's already a bit better, but then at the last hour it gets really hard to concentrate again. Whether that's the 7th or 6th or 5th our, I'm just really tired at that point. It's no good, and even worse; Tomorrow, the first two hours are PE. FINE. ;-; I'm soooo dead. And the hour after that I have Music, and I actually really love singing there right now... It feels as if I can sing just the way I want: No one cares if I have talent anyway, and since everybody's singing, they won't just hear me.