<human>: I am 19, he is 21. We have been dating for three years.

I don't really understand what's going on. We live together, he's been depressed, I have PTSD and panic attacks. We went out partying, I had a massive panic attack. It scared him, he left me completely alone causing me to be in a life or death situation. I was alone, on the streets of Boston, in the middle of a panic attack.

He threw me last year, breaking my collar bone. We worked through it. I threw the criminal case against him. 

I love him. He honestly makes me happy. I am living at his place and I have no family or good friends who I won't be a burden to. I am completely alone. I ask him everyday what's wrong, how he is, about his day, I pay for everything of his... he always said he was fine. Now one night has changed everything. We just celebrated our three year anniversary, we had a miscarriage together. We've been through so much... and he literally doesn't care about breaking up. He has no care in his voice or his words. I just, I have no idea what is going on or how to deal. I'm religious, he was my first time. I feel like I caused this, like my panic attacks and PTSD are just a problem no one wants. 

I've been there for him so much. I keep thinking this is all a dream. I don't know what I'm going to do. I have never, ever, been this alone.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: He's suddenly leaving me after three years. Part of my PTSD has to do with people leaving suddenly. He won't work it out at all. We live together and share almost everything. I'm devastated.