He just can’t handle conflict!

I have been married for two years and though my husband and I have a good relationship, I find that he can’t handle any disagreements. Whenever we have any argument, he just sulks and doesn’t speak for a day or two. He once stopped speaking for almost a week until I cajoled him and got him to start speaking normally again. This has become so routine that I now dread saying anything that will cause him to shut down. It’s childish and takes a huge toll on me because I have to tiptoe around him. If I can’t say what’s on my mind just because I’m afraid of upsetting him, it’s not a sign of a healthy relationship. I told him this a few days ago and he agreed, but says he finds it very hard to behave better when he’s in that zone. How can we work towards fixing this and being more communicative?
It’s great that you have begun speaking about it already and also good that he acknowledges the problem. Building better lines of communication is difficult because it requires a lot of work from both of you, even if it may seem as if he is the only one not pulling his weight. The important thing is wanting this to get better and recognising that it may take time. Call him out whenever it starts to slide into a period of sulking, stop trying to be the one who has to cajole him, and remind him that the onus of being an adult isn’t on you alone. Also, speak about it when you aren’t arguing, and reinforce it whenever possible. It may seem as if you are dealing with a difficult child, but this is a more common issue that you think.

My girlfriend and I haven’t spoken in two weeks, and I don’t know if this means our relationship is over.
What stops you from calling or reaching out to find out? Why assume the worst unless you have reasons to believe it?