I feel your pain
I compassionately understand what you are going through and there may have been some times I have undergone the very same thing or similar.
Guy #1: That Brian dude smells so awful because being near him makes me sick both mentally and physically.
Guy #2: I feel your pain! I have encountered similar jerks like that and they make me want to vomit.
Guy #2: I feel your pain! I have encountered similar jerks like that and they make me want to vomit.
I can feel your pain
Something you would say to someone in a deep and relatable situation, especially when they are referring to their past and you had a similar past or a different past but still felt the same thing.
Oliver: All of my life, I have felt like nobody has given me attention
Katie: I can feel your pain
Katie: I can feel your pain