Oh C.,
You are SO NOT wrong for wanting some time with yourself - or a hunka hunka grown up man! :)
I read your other post about your bickering boys... It sounds like they are getting off scotch free by not having any responsibilities around the house. Why don't you assign them chores that must be completed every day? I know it won't help with the bickering, but it will help with your work load!! My kids are responsible for cleaning the rooms they frequent. They have their rooms, their "den" area (with their computer, tv, etc), and the half bath / laundry room. I *was* doing all of the cleaning in the house (except for their rooms) then realised... WHY?! They are the ones who dirty it up! Plus, they have chores after supper including clearing the table, fixing the couches, feeding the dogs, vacuuming their den, taking out the trash and recycling, and putting the dishes away. (Geez, now that I write it out, it sounds horrid, and that I am sitting on the couch eating chocolate. I am not. We all do equal work! :)) They even have their half of the shopping list that they get when we go out shopping! It cuts the time we spend at Wal-Mart in half!!
My point being this: they are old enough to help out around the house. If I don't teach them now how to be responsible kids, it is going to be a cold slap in the face when they move out!
So, if you didn't have as much to do around the house, wouldn't it be easier to relax a little more on a daily basis? That might take some of the "sting" out of your daily grind. Plus, free up more time for you to go out and have some fun! (Which you well deserve!)
A word of caution... if you choose to implement the chores etc, I would go about it as they are helping you out. Tell them that you really need them to step into the shoes of the "men of the house" and help with things that need to get done. Make it seem like they are doing you a favor - not that they are being punished.
Then, for rewards, you can allow them to go over to a friends house, have "mini-parties" on the weekends (with one or two friends each), and give them something to look forward to. Perhaps that will make it where they don't fight as much.
I applaud you, C.. You have a lot on your plate, and you seem to be handling it so well. I know it has to be hard.