/feels/ - Advice & Venting

So my ebf got really pissed at me and started to say things like "I shouldn't have come online today" or "Why should I do anything with you?" and all that because I had to first brb for only 10 minutes yesterday because my parents wanted to talk to me, and then later I got a call from work late at night that I had to answer and the call went for too long. He got really pissed at me. This isn't the first time I've interrupted him when he was chatting with me and I also don't immediately respond. I only started to work recently so I was able to give as much as time and attention to him before, but now I'm not able to. I've mentioned that I don't have any personal time anymore and that I spend whatever time I got left after coming home from work only with him.

Am I the asshole for not prioritizing my ebf and for not refusing to do other things when I come home from work? Is he right when he expects undivided attention from me and when I can't give him that he is right to get mad at me and stop talking? Unlike him who lives alone I live with my parents so it's very hard for me to be left alone. I try to text him at work but work is hard and busy and I can't find the time for it. I think I also have ADHD so I completely forget that he exists and is online sometimes.

I honestly don't know what to do. Work is very stressful for me and I come home and I get this. I wish he was understanding especially during my work days.