Library - there's an answer (wow, long)
Bad news, Kathar. If you don't eliminate the boredom, you will be engaging in an exercise in frustration. You will continually feel like you are being deprived - of fun and food - and it will make you miserable. Beat the boredom.
Go to the library EVERY time you work out. Who cares how you look - are you looking for a date? Get yoga books, mediation books and find something fun to read. A good mystery series is great summer reading (Sue Grafton is good - fun, decently written and most libraries have them all.) Yoga and mediation are free - no equipment required but space on your floor. If you have a room and it's clean like you say, you're good to go. Don't fall for the commercial selling points that tell you that you must have a mat, blocks, leotards and $150 designer pants. You don't. Muscle toning, strength training and a more peaceful mind - what's not to like?
Make a routine - even if it is completely contrived and the only reason for it is because you say so - make and stick to a routine. It doesn't have to make sense, it just has to work for you.
8am - coffee, toast and jam, read Weight Loss Forum
9am - library
10am - gym
noon - lunch (whatever)
1pm - nap
2pm coffee, check email and kick around on line
3 pm yoga and meditation then snack
4pm clean something
5pm be diligently reading and don't annoy mom
6pm dinner and help clean up after dinner
7pm read some more/watch tv
9 pm short walk to clear your mind
10 pm lights out
whatever, make something up. On the days you don't go to the gym, clean something else. Walk the neighborhood. Job hunt. If you don't get a paying job in the next couple of weeks, volunteer at the library anyway and network. Volunteering looks great on a resume - tell your mom the employers aren't calling and you have to do something to build that resume. Blame the economy.
Get a blog and write your sorrows out. It will also improve your writing, and as an English teacher I can tell you that is never a bad thing. Doesn't matter if no one reads it - do it for you.
If the libraries are like our school system, they probably aren't hiring even part time. If you're in a neighborhood full of tract houses, does anyone need a sitter or day care? If it's close enough, you could walk and they'd probably feed you. Clear profit and no drain on your mom. What about lawn mowing?
I totally get the irrational parent thing - my dad was a doosie.
Seriously, make a schedule. Set it up so that when you start getting bored, oops, now its time to scrub the bathroom floor. Have the house so dammm clean you'll be able to do your boredom eating off of the floor. Only you won't be bored - so you won't have to.
I'm also brainstorming for myself, you see. I am about to be out of school (teaching) for the summer myself, and last year I gained weight out of boredom and frustration and financial worries instead of losing weight and enjoying my summer. So I am making myself a schedule, too.
Good luck. Remember, everything is temporary. Don't think about what you CAN'T do, think about what you CAN do and opportunities will open up for you.
Madrone