I think it's fair enough for her to want two weeks to herself. If you two are seeing each other for so long each day that she doesn't have any time to herself or time to spend with friends, that's just too much, I think you need to cut down on the amount of time you do spend together.
She needs time to herself, and she needs time with her own friends, and if you cut down a bit on the time you spend together then when you are actually together it will seem even more special.
GBRaul is right, dont force anything on her, never pressure her into something she obviously doesnt want to do - if she doesnt want you to meet her friends then you just gotta deal with that, but it might be nice for her to meet your friends - only if she is comfortable with that though. She will appreciate you for being so understanding.
"When I was 4 years old, they tried to test my IQ.
They showed me this picture of 3 oranges and a
pear. They asked me which one was different and
did not belong. They taught me different was
wrong."
- Ani DiFranco -