Op, I am a 6o + woman who's darling mum dies earlier this year. I was consumed so much with grief that I lost the ability to speak.
One minute I would be sat drinking tea, and the next would be in bed howling that I want my mum. I couldn't work, didn't want to go anywhere, do anything.
10 months later, I'm just about back working, can hold conversations, don't cry (as much) but I have images of my mum on constant fast -forward in my head, all day.
So to answer your question, you are not crazy, but you are crazed with grief. For me personally, I can't use the phrase 'gets better' , but it has 'got easier' in that waking up on a morning doesn't have me dreading getting out of bed. I can function almost normally, but I have my darling mum 'wrapped in a duvet to carry with me at all times' within my thoughts, which helps.
You are so right to say that you didn't know what heartbreak was until you experienced it, I was totally shocked to my very core, and will never get over losing her, but am leaning to deal with life without her.
I would say that regardless of what well meaning phases your family and friends come out with, deal with this your way. If you need to cry, then do so for if they're embarrassed then it's on them.
You're not hideous, again it's the grief. I didn't fight mine, and so thought I'd never do any of the things I love ever again. But slowly, and sometimes without realising, I have.
Be kind to yourself. Forgive yourself. One day you will be able to smile again....when you're ready. 