If you watch The Walking Dead you don't go online until you're caught up. I had Lori's death spoiled for me and since then I learned you don't use social media after The Walking Dead airs.
This episode really pissed me off but the theory that Glenn isn't dead has made me feel better. Glenn isn't my favorite but I really don't want to see anyone from the original 6 die (Rick, Darryl, Glenn, Morgan, Carol and Carl....Ok maybe Carl can die)
I heard another theory that not only is Glenn alive but so is Nicolas. Nicolas didn't shoot himself in the head, he was just imagining the whole thing in his mind. He was pretty zoned out and just from the way his gun shot to the head was a first person view facing Glenn, it felt like it may not have actually happened at all.
Kind of a long shot I know but it is something to think about. Of course if it was all Nicolas zoned out and imagining this then you would assume the camera would cut from Glenn on the ground to being back on top trying to make Nicholas snap out of it. But who knows...