maybe you need to take up a hobby..
where you spend time doing something that takes up your interest.
i mean i know that sounds wierd but say for example if you're mind was set on mountain biking.
you'd be thinking more about which hills you wanna take on this weekend, or cleaning up your bike etc rather than getting too attached to the girls. or having the time to think/feel jealous.
Also, you will appreciate the time away from the girl. which means you'll appreciate her having her time away doing her own thing. because when you want to keep saturday for biking, you're thinking i hope she doesnt want to spend time with me because i want to ride that hill this saturday. itll give you an appreciation for personal space and time.
Also its a challenge, and a sport such a mountain biking, considered a manly sport, man against nature, would give you extra confidence as in, you just took on a mountain this saturday..and won. that kind of confidence is what drove our forefathers to distant lands and made them legends for future generations..and i suppose thats something that could help.
personally i took up 2 hobbies, motorcycle riding on saturdays and kite surfing on wednesday afternoons.
I am also eventually looking to take on mountain biking as just a once a month thing and regularly take up kick boxing.
Ever since ive taken up kite surfing it has upped by confidence alot, when everyone else in the office is talking about the huge storm coming our way. me and my buddies are smiling waiting for 2pm on wednesday so we can hit the waves and ride em. it gives you a massive confidence boost knowing that even the cops, firemen and coast guard are holding hatches down, when we're out there enjoying natures fury. yes its a dangerour sport sometimes but ive got good buddies that cover each other and when its done i come out feeling like superman.invincible.
motorcycle riding on saturdays is smtn i have just picked up, its very cool, fun and man machine and road kind of thing. Plus the girls think its so hott that i spend a day just blasting through corners on my sport bike with my biker buddies.ive had a couple of the girls join me and both times it has ended in HOTTT!! shower s3x teehehehe..they initiate it ofcourse coz i think speed and having a man that can control a bike around hills turns them on..who knew!
Your other problems such as jealousy, insecurity, social skills and manipulativeness will also be addressed by hobbies such as this because most sports means you spend time with other people, you increase your social skills, and eventually you will grow into a set. Once part of a group of close friends that enjoy same hobby you gain social skills, lose your insecurities because you can act the fool around your friends and eventually around other people and manipulativeness just goes out the window when you're out there takin on nature all you have is your buddies to watch your back..
good luck..
i will say though, confidence is a not something we were born with, its something we learn. So dont assume that people out there were just born natural confident people...they learnt to grow into their shell and pushed thier capabilities to achieve that confidence..and you should look at what you have achieved to date.. dont count the women you have laid as a confidence booster because that is lame and its not really something that should change the way you feel about you..self esteem...self! esteem..i know guys that have had one girl since high school and are the most confident dudes ever!...so..do it for you..again..good luck..if you need advice further we gotchyu