Will losing weight definitely make me more attractive? (guy)?

So I'm considerably overweight at 23 and have never had a gf. In a (somewhat lame) attempt to attract women I've started dieting. I hate this as (fast) food was one of the few pleasurable activities in my life. Obviously I want a gf really badly but will losing weight necessarily make me more attractive (regardless of how I look) in a significant enough way to increase my chances with women? Any thoughts most appreciated (especially from guys who have lost weight).