I Hate Insensitive People

One of my childhood friends passed away last year in February. It's been a year. It still hurts and I'm not okay sometimes. Someone told me, "I don't give a damn! What do you expect me to do, feel sorry for you? People die everyday okay? You need to accept that death is life and you're going to lose people you love. That's the truth. You can't be sad ALL THE TIME. Stop crying! You look better if you just smile. I HAD to abandon you because I couldn't take you being all depressed and you swallowing in your pity."
Rude! Yes you can't be sad all the time but that was very rude. They didn't even feel bad. Why are people so harsh/brutally honest about death?