I had terrible first day in college :( what should i do? Drop the cl or go there again like nothing happen?

That must have been horrible. I bet that the cl feels bad about it too. Just go back and get there early and act like nothing happened. Trust me, they are going to be embarred and so is the instructor. Most students will be happy to fill you in on what you missed and partner up, especially, knowing what you went through. Everyone can relate on some level to being embarred before, so trust me, they will be nice to you. Chances are, if the instructor does talk to you it will be privately, after cl, and you can explain then that you are not mad. You might go to your campus website and send him a quick email if you like, explaining the situation, but I really think that you should just show up to cl and it will quickly blow over and no longer seem awkward.