I don't like most of my boyfriends friends

My boyfriend and I have been together for almost a year now. He has a large group of friends- many of whom he has known all or most his life- who he spends a lot of time with. When I first met his friends I was willing to make an effort to get to know them. But, over time, it has become apparent that I have very little in common with most of them and we are very different people. There are personality clashes- most of them being very loud and me being pretty shy. There is this clear awkwardness between me and his friends, like we just haven't clicked, and I get the strongest feeling of dislike coming from them, like they just don't think i'm cool or interesting or whatever. And i've really tried, really really tried to get on with them, but they just don't seem to want to get on with me, and don't seem to like me either. Because his friends are so close and important to him, this is a big issue in my opinion. I feel like I have to get on with his friends to be a good girlfriend. Its got to the point now where I find excuses not to go out with him and his friends at the same time because i feel so uncomfortable around them. I also get jealous if he chooses time with his friends instead of me. He wants to go on holiday with me and a couple of his friends over the summer. Should I go? Give friendship with them another chance? Or is it a bad idea?

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