There's really no reason to shy away from sexual relationships. The size of your penis is what it is. You just have to accept it and go on with your life. And if you choose partners who care about YOU, it won't be an issue. Do you imagine a real woman would say, "Oh, I'm sorry, we can't date, as I require a 7 inch penis."?
Why would you say your size hinders positions? Since you're a virgin, I'm just wondering how you know?

Seems to me that unless you're standing a foot away from your partner, most positions would work just fine. I really wish you wouldn't worry about this.