I suppose it might have a lot to do with being 18. When I was your age I wasn't getting much either but was just starting to find sexual relationships with women, not girls, to be easier. By the time I reached 25 I had been married for four years and had done two tours of Vietnam. At 26, I graduated from College and was divorced. That's when the fun began. I started getting ladies in my bed at an astounding rate and had some fantastic experiences sexually. I wouldn't be too upset about getting no sex, just hang in there and let time and maturity work it's magic.