I am going to assume that your relationship is serious in while giving this answer. I see it two ways.

1. In a serious relationship it would be natural that he would talk to you about it because it does affect you.

2. It is his life path and ultimately the decision must be his.

I am in a situation right now where I hate my job. I have chosen to apply for another job. I would be totally pissed at my husband if he try to tell me what to do because it is my life.

BUT in choosing to share my life with him I also need to let him have some voice in my decisions. He needs to be able to say his concerns and give some balance to the decision. In the end however the choice is mine not his.

In you situation I do believe that the decision was his to make. I also believe that you should be pissed that he didn't talk to you about it at all. On the bright side this is the perfect opportunity to expand your relationship. If you are able to discuss this with him in a calm loving manner you both could create a new way of relating to one another. It is tricky but could lead to growth for both of you.
Carrie