Is it wrong for me to be mad at my friends for this?

[myira_shine]

My father passed away suddenly about three weeks ago. Tomorrow will be a week since the viewing. I have three good friends who all came to the viewing and they came to the hospital while my family and my father were in there. However, ever since the viewing, none of those friends have asked me how I'm doing. I'm not someone who likes to burden other people with my problems or get all weepy on someone's shoulder and I'm sure they know that, but not even a "how have you been doing" text? It makes me sad and mad. Two of them even texted me about other things (their trip to California, their job offer options) this past week and didn't even ask me about how I'm doing with my dad suddenly passing. The other one has said nothing and he's all over social media, but can't bother to send me a text.

I get that no one really knows what to say during this time, but is it so hard to reach out? Am I wrong to be upset at them? Also, I don't think I should bring it up to them because I don't think I should have to remind a friend to act like a friend. But I also don't want to stay quiet/mad forever. What should I do?