Sanctuary, I commend you on your decision to wait till you're ready to have sex and know you're with the right person. However I don't see the previous 3 relationships as failures. On the contrary, they were successful in that you related for several months. The girls were just on a different journey. Sex is simple, love is complex. They went the wide easy road and you seek to travel the less used trail. At 18 don't be in a hurry to conclude your search for bliss and settle for just what's there. You have plenty of time. Feel good about your convictions or reconsider. I know, peer pressure and emotions make it difficult at times but you're thinking straight.

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As to marriage or celibacy, let a man take which course he will. He will be sure to repent - Socrates

Love is not looking in each other's eyes, but looking together in the same direction - Antoine De Saint-Exupery