I promised my daughter I would watch IT wih her tonight.
Oh wow, that's a pretty scary movie.  I'd want company while watching it too.
I am too scared though. I don't like horror films at all
I get what you mean.  Some films just aren't for some people.  It takes some courage to watch.
I promised so I hope I can do it 
Good luck.  But besides it being scary it's a good film in general.  Hope you two can enjoy it.