Hi sneha, what u r thinking is common in introvert persons but actually there r some culture, common and necessary things which u have to do. I’m not telling that marriage is compulsory but it is a useful thing for ur future. It is difficult to marry a unknown person but first of all try to make contact with him till when u feel comfortable then only marry him. Even me also was that kind of person who was not wanted to mingle with people but once u come over from this then u will be a bold as u improve ur communication with others.