girls normally behavior badly

I am so sorry that you have a very bad experience of having girlfriends. Maybe you just pick girls from the same typical, so you always end up getting a very jealous girl and the bugging ones. I think there are many types of girlfriends, some of them are like what you have said, but some of them are not. They are independent, usually more mature and you would never see them in the need of your existence, until one day you would feel that it does not make any difference whether you are there or not. I think it is just two extreme examples, but you would always be able to find the other types in between. I think befriended with those girls before you make them your girlfriends is one good thing to do. At least you would be able to learn their behavior before deciding to take the relationship into the better level. Good luck finding the normal girl with normal behavior :)