Hi (((((((((((((Samm)))))))))))))))
I'm so sorry to hear about your dad. And i know that no matter what any one of us says its not going to bring him back, but you really need to just focus on taking care of yourself, as hard as that is. I think we both know that your dad wouldn't want to see you hurting yourself (by not eating) ... so even if you can just try a little bit at a time. We are all hear to help support you, and listen.
And like fayerody asked, is there anyone that you can talk to like a counsellor?
Keep in touch ...

Jacq