I do try to group. The problem is the enemy team is usually just so far ahead :/
Let's take my most recent game for example. I'm having a jolly ole time cs'ing bot lane. Work up a 700g advantage over Ashe from farming alone. No kills since I can't really tower dive an Ashe/Taric as Sivir with a Raka supp (no idea of good players can, I just can't). But, I look at the score and the enemy AP/Tank Swain already has 5 kills, the enemy anti-tank Rammus has 2, and the enemy assassin Kha has 2. In this situation, I just don't know what to do. That's why I'm asking a higher elo person to help me :)
And paaalease 8 cs/min is a bad game for me ;)