I have a super intense, high-needs, screechy baby whom I adore but who also does not want me to do ANYTHING, EVER, except pay attention to him.
The "don't use toys/baby seats as a babysitter" thing is important advice for people who would be tempted to do that. You don't sound like that person.
I love my Ergo, spend most of my time with my son (also 11 months), co-slept with him until a month ago when he decided to sleep better in a Pack N Play, and we're still breastfeeding. I'm super responsive to his needs. But let me make this clear:
Without a swing (when he was a newborn) and the Rainforest Jumperoo (5-10 months) I would have LOST MY MIND. Then I wouldn't have been able to respond to him at all, because I would have been insane. :)
Those things are popular because babies like them, and I think, do whatever it takes to survive the first year!!
My son gets bored just hanging out with me, and I finally had to admit that he doesn't WANT me to "wear" him all the time. He wants other stimulation sometimes.
Give yourself a break. Doorway jumper, jumperoo, exersaucer, something that lights up and makes obnoxious noises. As long as you're not using it as a replacement for playing with you a lot of the time, you're fine.