My boyfriend asked me if he could go on a vacation with his friends. A friend of his will pay for the said vacation. I know it's good to have time apart in a relationship, but the problem is the friend paying for this vacation is a girl. I haven't met this friend since she's based in another country. But I've heard of her before my boyfriend and I started dating. I told him it's OK to go, but the truth is I am a little uneasy about it. I am a little jealous that he will be going there without me, knowing that its not an "only-boys" trip and I haven't met any of his friends that will be going along. (This set of friends are his friends in college so I don't know them). On the other hand, another part of me is OK with it. I don't want to be clingy, and I want him to enjoy this time with his friends. What should I do?