I have a group of friends and we all known each other since 7th grade. This one kid in our group plans these little events (like going to the movies, going somewhere to talk and eat, etc?) and most of us go except for me and two others. No one complains about the other two but they complain about me not going when I keep telling them that I can't go due to transportation problems plus I got stuff to do at home. So everyday I go to school listening to their bickering about me having no life and being the weak one in our group and that has been going on for the the past month.
Hard to tell. Right now you might prefer a more limited social interaction, but ultimately this means that when the frame dissolves, you'll be left out, guaranteed; And it'll be more difficult to join another clique in later settings due to increased pressure and variance of interests. They may part ways as well, but you can be sure that this 'leader' fellow of yours will either form a new one or do their damnedest to keep this alive. Not that they're necessarily more social than you - it's just that solid friendship takes more than passive effort.
Can't predict accurately whether the loner lifestyle will suit you; however, asking yourself whether you currently have something else you're passionate about pursuing and how strongly may give you an idea. Depression fills the void where passion exists not.
Your friends don't sound very nice and definitely not understanding. The Bible at Proverbs 18:24 reminds us "There are companions ready to crush one another, But there is a friend who sticks closer than a brother."
Perhaps you're tired of being crushed. Maybe you need to seek out new companions. The website below has many articles dealing with friends, good and bad and how to make them.