How should I deal with a roommate that never leaves?

he is not being rude. don't tell him that,. you haven't told him how you feel or what you need. he probably has no idea that any of his behavior bothers you. silently boiling in anger is not a good idea. if you want quiet, you can go to the library. if you want him to leave the curtains closed when you nap, you will have to ask him. you need to open communications with him and talk about what you both need. the best method is to improve your communications skills, address problems earlier (the 1st time soemthing happens, be honest about it) - by now you have 'betrayed' him by not telling him how you feel and you let him go on. don't curse or yell. the best method is to ask for a conversation. listen to him and his needs too and see if you can come up with a plan that works for both.