My girlfriend still is friends with all her ex boyfriends?

Unless she gave reason for you to be concerned I think you should just chill out. It seems to be pretty innocent to me. As you have said, she took you along to these places so it's all pretty legit. Not all relationships end sour, and some people remain friends. You can't ask her to get rid of them when she hasn't really done anything wrong. Now if she was acting all suspicious and seeing them alone then you have a right. If you do feel really bothered then just talk to her. You have been together long enough and you do have a right to make an opinion. If you do decide to talk to her, don't make it out that you don't trust her because it will hit the fan then. Just be cool and casual about it. But personally, I think you shouldn't worry :)