"I feel like I'm not even good enough to carry their purse, let alone date them." Work on this; women can smell it, and they don't enjoy the scent.
"It seems like all physically attractive girls intimidate me, like give off a 'mean girl' vibe." Learn to separate mean girls, from shy girls, from girls just having an off day.
"how can I get over this?" Practice.
"Is this true for most girls?" No.
"Are there physically attractive girls out there that are down to earth and not into the whole 'party till you die' thing ?" Yes, very many. But again, they don't date men that smell like fear and insecurity. No woman does.
this is NOT true for most girls. a lot of girls that are physically attractive are given the label of a mean girl because some guy at one point or another treated them like they were less than a person and made them feel bad about themselves. being pretty then becomes a curse, not a gift. approach her. if she knows you're not some idiotic jerk or just another horny boy, then chances are you won't have an issue with the "mean girl" within. they won't diss you unless you don't treat them well or if you make it clear you're just wanting to talk to them because they look good.
Well, most attractive girls play the game and really ARE mean, it's not just a vibe! Take it as a warning and steer clear. There's nothing wrong with you! Stick to 'nice' girls; many of them esp the Asian ones are really attractive as well, and not nearly so often mean, manipulative, etc.
You think anyone you're attracted to will not like you.
You have to believe that you're worth it or no-one else will. I don't mean like you're some sort of hair care product. I mean there are all sorts of people who couple up. Looks and physical attributes are the least of it. But the people who do couple up believe they deserve to be with the person they're with.
As long as you feel intimidated by attractive women, then all you're going to get is intimidation.
Go learn public speaking, or go to the gym, or get some self-hypnosis or meditation or something, whatever it takeas to make you feel good about yourself. Then, all the people around you will feel it and feel good about you too.