<human>: Give me a shortened version of the text

My boyfriend and I have been together for four years, and for the most part, our relationship is great. We enjoy spending time together and very rarely fight. We have had our issues, just like any other couple, but we always overcome them

On Sunday night, my boyfriend and I got into a fight. Well, really, he got upset with me. It was over something silly at first, but then he ended up bringing up a bunch of stuff that he has clearly been angry about for awhile. He made valid points, I understand that I'm not a perfect girlfriend and can do stuff that doesn't always make him happy. I just wish he would have communicated all this before freaking out over it. We fought, and he ended up leaving before we resolved things. Now, as I said, we hardly ever fight and most of the time really enjoy each others company. 

Now here's the issue: yesterday, he ignored me all day. I sent him a text in the morning and just never got a response. This upset me a bit because he usually doesn't ignore me, even after we fight. I'm not really sure what to do now. I get that he was pretty upset, so do I  just let him have space? Or should I try to get into contact with him? I really don't like being ignored, and can't help but to assume the worst...but I also understand that it hasn't been that long since we fought and sometimes people need space. If I do just need to give him space...how long do I let him be alone for?
<bot>: Boyfriend of four years got upset with me Sunday night, and left before resolving anything. Sent him a text yesterday, got ignored all day and I can't help but to assume the worst. What do I do now?