LadyPhoenix, I had a "magic number" which I STILL haven't met but it made me be single for almost 5 years. I had some people hit on me here or there but I never TRIED to date. Then one day this guy hit on me at a show, someone I wasn't interested in but it made me feel really good. About a week later I posted an online dating ad and I went on a date with 4 guys. They all liked me a lot, two of them are still my friends and one of them is my boyfriend of more than 2 years.
In my experience, the minute I thought "I'm going to quit 'acting fat', then suddenly there were all these people available. It happened to me when I got my first boyfriend, right after high school, too. Confidence gets you FAR.
Everyone is right, the thinner you are the more likely you are to be hit on. BUT if that person only wants you at your thinnest (and not now) they are not a good person to have. My skinny underweight boyfriend has watched me go from 40 lbs overweight to 65 lbs overweight (and hopefully back down again) and never said a single negative word.