history: My roommate has been gone all week. I don't have anything to do without him here.  My roommate has been gone all week. I don't have anything to do without him here. what about doing something you enjoy? 
current: It's just not the same doing something by myself. I don't have anyone to go do stuff with. 
next: i know it can be tough but maybe trying something new or outside your comfort zone might give you an enjoyable experience