My girlfriend and I have been dating for a few months and we are getting to the stage where we want to try and show our feelings for each other in a more romantic way. Thinking about relationships that my friends have had, once they had sex the first time, it seemed like their whole relationship was based off of sex. That could be true but I know that before they had sex, they loved each other as much as my girlfriend and I love each other. I'm afraid that if we have sex, our relationship will be based solely off of that, which I do not want to happen. Am I just having pre-sex "jitters", both of us are virgins, or is there really a need for concern. I don't want to lose her for a night of fun or whatnot.