Story about threesome dating

The first time I had threesome was four years age, when I was 18. I had a boyfriend who was a fan of sex, actually a fan of group sex. I didn't know threesome date until he said that he want to have one with me and one of his friends. At first beginning, I turned him down. In my opinion at that time, I can't accept threesome. I thought love is between two people. One day, we had a lot of drinks at a party. He asked me to try a three way for him. Just one time, I got drunk so I said yes. That night was the first time to know what is threesome.