His whole group is stuck.
They physically cant move forward, while Morgan psychologically cant.
He blames himself for becoming a leader and leading his group into their current predicament.

Credit: Ryan Green/AMC
Jim, still blaming Morgan for the walker bite thats now slowly killing him, isnt helping matters.
A walkie message from Alicia lifts all their spirits.
I got us stuck.
Hope is a choice.
you might either choose to wallow in self-pity, or you might choose to trudge forward.
Morgan makes this case when he finds Jim being dramatic and standing on the edge of the roof.
Sarah doesnt care whether Jimbo helps or not.
He can choose to let that part of himself live on.
Right now, though, hes choosing to wallow on the roof alone.
There are traces of her through the dead walkers she left behind.
The group also finds a note from her that says she went for the freight elevator.
He opts to stay behind in the hospital to cause a distraction so the others can survive.
John reunites with Charlie (its cute) and talks with June over the walkie.
They make a plan to rendezvous in the outskirts away from the hospital.
Things may not work out for the group as planned, per a warning from Martha.
Maybe shes just crazy.
Yeah, lets go with that.
(Recap continues on the next page.)
Morgan succeeds in causing a distraction.
He takes a walker from below and swings it off the roof onto a car.
The alarms go off, luring all the walkers to the vehicle.
As he repeats again, There are things I gotta make up for.
So now its Morgan and Jim marooned on the roof.
It doesnt make it all the way, forcing Morgan to improvise.
(Just go with it.)
Thats when Jim finally does something good.
The blaring car alarm that comes moments later signals his death and their signal to escape.
Martha is long gone, having wriggled herself loose from her restraints.
Then they all laugh about how much he would hate that name.
So where do they go now?
Martha also has a new walker: Jim.
Alas, here we are, and now Martha could use walker Jim to break Morgan.