What are the chances that my ex will come back?

My boyfriend and I had been fighting for a little over 2 days because he was being immature about the rules and regulations associated with COVID-19 (he was inviting his friend over to hang out while his sister was developing symptoms). On top of that, I had been going through some rough problems and I wanted to talk to him about them. He outright told me to talk to someone else because he was busy with his friend and ignored me for half an hour. I explained that I needed him and he said that I was being overdramatic and ignored me for the rest of the night. He even turned off his location on Snapchat. I decided to talk to his sister, because I heard that she was feeling sick. She asked me about the fight, and I told her about it. We then exchanged photos of my boyfriend to lighten the mood, and I sent one picture of him with the caption saying "you turn me on". She laughed at it and I though nothing of it. The next day, he called me furiously, telling me that his sister had told him that I had talked to her about our fight, and that I had shown her intimate pictures of him (which was completely false). I told him that she was exaggerating, but he said that she had no reason to lie to him. He told me that what I did was unforgivable and that he couldn't look at me in the same way again. He said he needed time to think, but called me back shortly after and said that we were done, and nothing could change his mind. Is there a chance that he will contact me again?