Actually I had always been in some sort of relationship (girlfriend). Now I don’t have any but I am always looking for girls. I don’t know what has happened to me but I am always looking for a relation with opposite sex. Can u suggest what I should do to overcome this problem or else I think the feeling what I have is of sex only?

To some extent it can be normal for guys in teen age or early twenties (you have not mentioned your age). To analyze the reasons behind your compulsion to have relationship with girls, I require lot other details. You need to work out on your personality and related factors. That’s all what I can suggest from this information.