Good. Now that's more like it. Now we have something to work with.
That second sentence of yours kinda shed a little more light on one of your problems. You said that you leave things up to the girl to decide the next move in dating/starting relationships. That's a HUGE error,man. Women want a man who is strong and decisive,someone who takes the lead.Puddly, DO NOT listen to women. If they try to give you advice,do the opposite. I'm serious man. They'll tell you that they want this or that,then you'll do your absolute best to give them exactly what they said they wanted,then they'll still be unhappy. You can follow their instructions to the letter,and the only thing you'll accomplish is being lead into the ditch.
You also said that you think that women are turned off to you because you take yourself too seriously. Yeah man,that'll do it. Woman like men who are fun,exciting,and full of life. Emotions are contagious. If you're a happy person in general,excited to see what each new day brings,women will pick up this positive vibe coming from you,and will enjoy being in your presense. However,this also works in the negative. If you act and behave too serious,they'll pick up on this as well. You'll come across as stiff,boring,and dull,which are ATTRACTION KILLERS for women. Women are emotional. They want to "feel".
Boring and dull are not emotions. They are the absense of emotions. Believe it or not,a woman would rather feel anger than be bored.
In order to change your situation with women,first you need to change yourself. Remember what I said about women being attracted to men who are happy,upbeat,and positive? Well look at your life. Do you have things that make you happy in it? You have family,friends,a career,and hobbies,right? These things should excite you,make you happy. You know why I say that? Because not everybody has these things. Not everybody has a career,not everyone has friends,some people don't even have families they can turn to in time of need. Appreciate these things in your life. Don't take them for granted,because one day they might not be there.
You have your health,right? Do you know how many people are sick with infections and diseases,who would trade places with you in a second?
Don't even take this for granted.
From what I can tell,your problem seems to be twofold:
1: Personal problems(with confidence/self-esteem).
2: Lack of understanding about how attraction works for women.
Problem number one needs to be solved first. If you just ignore it and focus your attention on women,not only will you have a very,very hard time trying to date,but even if you did manage to get into a relationship,your problems with confidence and self-esteem would destroy the relationship. You see what I said there? I said that the confidence/self-esteem issue would destroy it,not the girl. The girl would be rude,act stuck up,snobbish,try to walk over you and control you,and basically the relationship would be nothing but continual heartache,pain,anger,and confusion for you. And the happier you try to make her,the worst she would behave. This is how women act with men who are insecure,wimpy,or someone who is afraid to take charge. If you don't lead in the relationship,then you'll be dragged around by her. Trust me,I know what this is like. And it all comes from you NOT BEING A MAN
So yeah,look at your life. Find things to be happy about. Then when you are truely happy,this will come across to women.