Depressed?

I've never spoken to anyone professionally to help me learn how to come to terms with the loss. All I do is cry when I'm alone, and when I'm around people it's all I think about and all I want to talk about but I can't. It's starting to get overwhelming. There's times when it's all I can think about and it feels like it's crushing me to the extent where I can't breathe, I have to get out of whatever room I'm in and just run. 

My boyfriend thinks these are signs of me being depressed, because I can't cope sometimes.  I don't know what to think sometimes, I don't even know why I'm writing all this here, I just need somewhere to vent😥