tired or lazy?

i must have a long rest in the noon these days during the summer vacation. it may last for more than two hours. gerenally, everyday i get up at about 6:00. and after part-time job of 4 hours or two, i return to the domitory at about 1£º20 everyday, and then have a browse with music on the internet. during the music , i will be sleepy and tired soon. you know , the next is the long rest. every time when waking up i find it is near 5:00.as s result , i do nothing but sleep. i don't know whether i am too tired or lazy to get up. i comfort myself that maybe i am too tired last semester and will still be busy next semester, so i need relax as much as possible. may be it is just an excuse.