A little help here?

I've had a huge crush on a boy for awhile and I recently found out that he likes me too. No problem right? Wrong. This boy is my current boyfriend's best friend. And a friend if mine also likes this boy(she doesn't know that I like him too) Anyway, last week my school hosted exchange students from Colombia, and the host families and students went on two retreats. The boy was on both and my boyfriend wasnt. I had to sit por the boy both days and we had to stay in groups(he was in my group) he eventually found out aBout my extreme feat of spiders and slight claustrophobia. He asked if my bf knee about this and I dicho no. He then insisted that my bf doesnt know much about me. The rest of the día he flirted like crazy and let me wear his sunglasses. Afterwards he invited a group of people to come to his house including me. I went but so did an exchange student who was clingy and tried many times to make a move. I told the boy never to tell the exchange student where I was and he agreed. When I was telling everyone goodbye, he gave me a big hug that I wasn't expecting and I thanked him for helping me out. This boy then went out and told my bf that I was flirting with him and hugging him a taking pictures with him all day. A) he hugged me. Once. B)he was flirting with me not the other way around C) he suggested that me him and another boy take pictures on our way home. So now my bf is mad at me because he heard the wrong sid of the story. And he has lost a lot of girls to his best friend. And my friend still likes this boy. Yeaaa I'm screwed. Any advice?