Rule #1 of all international travel- even for extended trips- do not pack more than you can carry yourself for a couple city blocks (or up a couple flights of stairs) without too much effort.
If need be you can ship a box or two ahead of you, or have your mom send it on later.
If you have a couple months before leaving, which it sounds like you do, I would devise some method of tagging the items you use at home for 30 days... either with a photo, or on a list, or put a sticker on them (that might not work with clothes, toothbrush) etc. This will give you an idea of what you really need and use for 30 days. Then review that list and don't bring anything you can buy there (such as shampoo, toothpaste). DO bring a small supply of things you really love that you are not sure you can get there, like makeup or face cream etc. I wouldn't extend that to food, part of the fun of an extended stay in another country is that you learn how to enjoy new foods you might have never tried at home. Go in open minded.
I really doubt that you will need to bring cookware, sheets, etc for a 7 month stay. You can probably pick up a few used or inexpensive bits of cookware there and buy one set of sheets and a duvet which you can wash as needed. A good microfiber full size "travel" towel might be a good investment to bring with you, as they dry very fast and are easy to wash, so you might be able to get away with only one or two towels for the time period. If you like using washcloths you might want to bring a couple small microfiber versions of those too. They are not used much in most of Europe and can be hard to find in shops in my experience.
Do keep in mind that in Europe washing machines are easy to come by (they are often installed in the kitchen) but dryers are not. Many people hang everything out to dry, even in urban areas. Laundromats are also not as commonly found as they are here in the USA, but they do exist in larger cities if you search hard enough.
Books are heavy. If it's feasible I suggest investing in some sort of electronic book reader that is compatible for use overseas. I know Kindle has one, Nook might also. I use an iPad which works ok for short trips but I would not want to use it for my primary reader. If you are in Paris you will be able to buy English language books pretty easily, I don't know about the smaller towns in France.
Best of luck on your adventure, I'm quite jealous :)