Are these people very close friends of yours? Unless you are a best friend or relative you most likely wouldn't be included- although to me being invited is being included

- in these events. We don't pick friends to be Godparents and I only had my sister as my maid of honor. I wanted things simple and for me she is way more important to me than a friend.
Is your BFF getting married? If it was just people I was friends with but not superclose I wouldn't care. Personally I would rather be a guest. I love picking out my own dress/shoes/hair. I also have a better time.
I wouldn't let it bother you. Go to the weddings and have a good time. If you are already saying to your bf that you probably won't have a good time because you hardly know anyone you will then become the girlfriend that is too dependent. Not trying to be mean but if he is spending all day worrying if you are okay then it is not fair.