I can relate to that, it would make you feel ignored or discounted. My H did something similar the other night that really hurt my feelings....along the discounted/ignored lines.
I was working on a Christmas gift for his parents, had been most of the evening. He had been in the same room watching some tv and we had been talking. He went out of the room for a bit, I thought he was coming back....30 minutes later I got up to go get a drink and noticed he's not in the room with me, he's not on the computer....and our room was dark. He had gone to bed without a word to me. No goodnight, not an "I'm tired"....nothing. We always go to bed at the same time, always....and he just went to bed without a word to me. Sounds childish probably but that really hurt my feelings.
