There is more hope for a pretty girl who wears clothes than one with a shit ton of makeup. Here's a little insight into the male mind, it may shed some light on why you tend to notice that trend. No matter how attractive he is, a guy's standards are very low (generally speaking. It does vary slightly depending on their confidence, etc.) when he's just looking for a hookup, one night stand or casual sex. The guys gravitating towards cake-faced girls who wear short shorts that look as if they were painted on are the guys looking for pure and simple sex. However, when a guy wants a relationship, his standards go through the roof. Those guys tend to attract less attention than the casual sex-seeking ones. And those relationship-seeking guys will, almost every single time, go after a girl who is naturally pretty and has more self-respect than a girl who cakes on her makeup and wears slutty outfits just to draw attention
Yes. Dress a little more revealing to land a guy. Once you're dating he will appreciate you dressing more modestly. Most men do not like a woman who needs so much attention from their other men that they still dress to catch men's eyes after they have a boyfriend.
Yeah you're settle down / LTR material. The "slutty" girls are for sowing wild oats.
It's great that you're pretty and it's great that you wear clothes. However do not think that what you do wear can't make you unattractive. In the same way as a guy who likes girls who show skin won't necessarily be interested in a girl that wears skimpy clothes if that girl is unattractive, a guy who likes girls who wear clothes won't necessarily be interested in a girl who wears clothes that are unattractive, even if that girl is pretty. This is because what you wear, as well as your hair, contributes to how you look and therefore whether or not you do indeed look pretty :)
Last, glasses must be considered if you wear them.