what shall I do?

Had a massive fight with my boyfriend tonight. Been together for three years and two of them in a long distance relationship. Very long distance. I am the one to travel and see him for couple of months at a time though. At the moment I've been three weeks in his country and he is super stressed at work everyday and always grumpy. We hardly exchange words and only had sex four times in those three weeks. For this weekend we drove to his mothers place and he had to do chores in town and sent me off with his mother to visit his grand mothers grave. When we came back he was grumpy and played with his phone over family dinner. I went to bed earlier hoping he would follow me and we can be intimate but instead he told me off for leaving bedroom window open at night. In the morning I felt like I had enough and we had a fight on our drive back home. To make things worse I told him it's over and left his mum a note saying thank you and good bye. In reality I just wanted to scare him that he might loose me but made things worse. When we came home I packed my things and pretended to leave. He convinced me to stay but then started telling me how we should end it as it is not a first time I do that and so on. End result he made me sleep on the couch tonight and told me to look into changing my flights back to my country earlier as we can't be together again as we are having those fights repeat. I love him and he loves me (he told me that as we were fighting) and I don't want to leave right now especially that we have holiday booked in 10 days. What can I do? How can I talk to him about keeping that relationship!