You loved Glenn to death,everything was perfect between you two,but after the attack at the prison you couldn't find Glenn.

you were on your own,and were walking to Terminus thinking that he would be there.

on the other hand when you do arrive there Glenn was weird,he was cold...he acted like there was nothing between you two.

you were confused,and walked away.

Rick who saw the whole scene asked Glenn what happened.

"It's dangerous,she was about to die for me at the prison and if acting like this saves her then...let her think I never loved her"