Group Project!

Why is that I am always the one that ditches everything? I always notice that I never do anything with our group a friends as a whole. I was looking through some of my friends' pictures and I was quick to notice that I was never in any of them. Kind of like how I didn't go on the zoo trip or go to the Formal? I'm in none of those because I wasn't there. Why do I never attend such events? I don't know. I know for the both of these I actually had good reasons for not going. They usually involve certain people going or trying to avoid drama. Then I always hear about the drama that went on and am thankful for not going, yet... I see the pictures and they pierce my heart. Where am I supposed to be? Am I making wrong decisions?