I'm sorry you lost your friend and the friend group. I had that happen when I was around your age, and I also went through a brief phase where I just didn't feel like doing homework. So, just to answer your question about whether or not it is normal, I do think that a lot of us have these sorts of temporary situations. The fact that you recognize you don't really want to be pulling pranks and that you want to do well with school are good first steps towards achieving those goals, so I think you will come out of this phase soon!

What would your ideal outcome be regarding your friendship situation?