I don't think you will bulk up, the bulky appearance comes from body fat, not muscle.
Trust me its hard for any women to put on enough pure muscle to make them look bulky. The bulk is from having too much subcutaneous fat (under the skin.)
Muscle is way more dense than fat so even if you are packing on some decent muscle, by the time you get to your desired body fat, you will love the way you look!
Just look at that picture I posted on page 1, if you can't squat as much as her, you won't be bigger either. Muscle size = muscle strength. Not to mention squats are way more effective for getting six pack abs than crunches.
I hope this makes you feel better: there a lot of men out there that love women with curves, not stick figures, so love your body!
It's lack of faith that makes people afraid of meeting challenges, and I believed in myself. ~Muhammad Ali
You must have long-range goals to keep you from being frustrated by short-range failures. ~Charles C. Noble
July 6th 2010: 225 lbs, 24% body fat
Nov 30th 2010: 181 lbs, 12% body fat
Dec 28th 2010: 177 lbs, 11% bf
Total weight loss 48 lbs.