How can he just leave me?

I honestly never thought my bf and I would break up. It’s the worst feeling I’ve ever felt I feel like he just threw my heart in the trash. We had to break up because he started threatening me and my family if I didn’t give him our puppy for him to take his parents house all drunk. I wanted to stay with the puppy because I’m scared of being alone at the apartment and he was soooo drunk he wouldn’t stop threatening me saying he will take me and my family down.

We have been together for 7 years and i feel it in my gut that this is the guy I am meant to be with me.. it was just a bad fight.

I handed him the dog and he left as soon as I did. This happened late last night and he just came to pick up his things to move out. I wanted to fix it so bad and beg him to stay but I know it’s not a healthy relationship. He even called my mom threatening her she had to block him. I locked myself in the room but he wouldn’t leave me alone until I gave him our puppy. I even forgot to mention that I paid for him, I paid for the pet fee at our apartment too. He didn’t pay anything and he took him away from me.

I feel so stupid, I miss him and can’t believe this happened. I want everything to go back to normal. I want to fix it but I know I shouldn’t.... he didn’t even bother fixing it like how he always does when we have little fights.

He has already gone on his social media bragging about how he’s single...

I feel so depressed and lost. He’s coming back for the rest of his things tomorrow, and it’s going to be so hard.....will I ever get through this? Did I do something wrong? I feel like I should’ve ended it with him but it feels so wrong.