I found out yesterday that an old friend died on the 11th (his mum posted on his Facebook profile

)
The funeral is tomorrow but I really can't decide whether or not to go.
I went to Allie's funeral (peanuttree) & now instead of remembering her as I knew her, I remember her coffin & her funeral & her brother & her Dad crying, it's tainted my memory of her.
I'm going to feel guilty if I don't go but I don't know if I can face it, especially as I'm not in such a great frame of mind myself at the moment.
Advice?