So is waiting for him to contact is the best thing I can do now?

So me and my boyfriend has been together for about 8 months, and I went back to Taiwan for a summer job(only for two and half month). We are committed to our relationship and planned on move in together when I get back. He is working on his master thesis this summer and he recently just got two dogs. Everything went really well and this is the first time we have been separate this long. Until last Saturday night, we got into a stupid fight and it wasn't his fault at all, it is just me being stupid thinking he doesn't pay enough attention to me. The worst part of this fight is it was all IMs. He said he is gonna go cool down and will talk to me when we are both civil and nice. But I made a mistake, because I