Why pick a fight and avoid the other person?

My boyfriend has a habit of picking fights and then avoiding me. For instance he would address a problem, I would ask questions about it and he would not answer. Or today for instance, he got mad at me since I was not able to find a place for him to stay in my hometown. He got mad at me while we were on facetime and said he was hanging up the phone. I called him back and I asked him what was wrong several times, he stayed silent the first and second time I asked him and then said he was going to bed. Why is he doing that?

Why pick a fight and avoid the other person?
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