Open Question: How to stop being so pessimistic? How to start approaching girls?

[feedcrawler]

Generally, I'm a happy person and usually upbeat, but whenever I see anything involving a guy and girl doing something sexual/intimiate (kissing, etc), I get all pissed off and think shit like "wow, of course a douche bag that cheats on girls makes out with some girl the first day he meets her". Reason being, because I've never had a girlfriend, kissed a girl, or anything, so when I see people doing things like that, even if they are nice, I always assume they don't deserve it, and I get all pissy annoyed, and jealous. I have a good sense of humor, and I'm a nice kid, but I just don't know how to meet girls. I honestly don't think I'm bad looking, and have a good personality, but when it comes to girls, I never know how to approach them. I see so many pretty girls when I go out but I never know how to start talking to them. Plus, I have a foot fetish, and I feel like girls will automatically assume I'm a freak if they know, which I'd have to tell them eventually, because I would never date a girl that's not ok with a foot fetish. How do I stop being so pessimistic, and start approaching girls? Is it just a matter of practicing?

More...