Regular silent treatment

I am adding this anonymously because it is embarrassing to even admit this bothers me. Has anyone here been with someone who regularly gives them the silent treatment or ignores them, even at the slightest hint of a disagreement? My boyfriend is extremely sensitive and loving and normally I can depend on him for anything. But when it comes to us not seeing eye to eye, he completely shuts me out. He says he can't handle the stress and tension and needs time to process it. That means ignoring all calls and texts from me, sometimes for a few days. I have tried, begging, approaching him after the argument has cooled off, and he has even heard me bawling in voicemails pleading for him to call me back. Again, this happens even after a SMALL disagreement. If I happen to be the one who gets angry, he still does the same thing, so either way it all ends up with him shutting me out and me not being able to focus on anything other than how horrible I feel. I would rather be yelled at than be ignored and made to feel like I have no value. When it's over he either acts like it was no big deal or he says he doesn't know why he behaves this way and that I am so patient. Am I putting up with too much or is this actually normal?