Does not look like a bedbug at all, its in the beetle family, i don't know what it is but its a beetle of some kind.
Do yourself a favor and throw that couch out and get a new one or a un-infested used one.
Here it is i believe http://bugguide.net/node/view/257941
looks pretty dang close to me
But with bugs like this there can be subspecies of the same beetle that is only slightly different in look but is considered the same species.
They are not interested in human blood or anything maybe your dandruff along with wool and such. But i would still get rid of the couch and bomb the room. I am a hunter and outdoorsman a little bit and i don't mind bugs in the woods at all but, having a little bug crawl on me while i am laying in my house on the couch is kinda skeevy. Our homes are here for us to get away from the bugs and pests.
Beetles almost always have mealworm like young then cocoon themselves then emerge as beetles. Most couches have a covering on the bottom, remove it and see how many empty cocoons you have in the bottom of the couch. This will give you a good idea on how bad your infestation is. Good luck