It sounds like there is an underlying problem that is causing him to come up with all these excuses for being angry and upset w you.
Have you two recently been through an experience that shook the relationship a little?
How has the communication been in the relationship? Have you guys had any other problems that remained unresolved?
Or may be , and I hope that I am wrong, he is anxious about moving in together? Maybe the reality hit him and he is questioning his decision.
Again I’m sorry for all these questions, it just seems like there are other underlying issues that he is choosing not to share with you at this time.