Eheheh, I see a lot of people who find Hitomi annoying. Those are timid cowards (like Hitohito in first chapter) who imagine themselves in Shousuke's shoes and shiver at thought that someone invades their little isolated worlds.
I can tell because if I turn off the brain, I feel the same.
My point is: the two strategies are viable. Either you can do everything yourself and therefore can allow yourself being alone. Or you can push yourself to interact with other people in order to get all cookies given by socialization. These two represent such points of view.
To determine which one is better author proposes using physical power. As he made Hitomi stronger, I can guess he is rooting for socialization.
So don't hate Hitomi. After some adaptation Shousuke will be fine with his new friends, acquaintances, experiences, maybe a person to love.
As well as you. But in your case there will be no Hitomi to drag you there. So, the choice is fully yours.
I, personally, prefer staying alone. Cause, y know, a bother