The song "Wish You Were Here" by Hey Monday is about missing someone who has left and feeling alone without them. The song talks about how the speaker wishes that the person they miss was still there with them, despite the fact that they know it is too late to call or try to bring them back. The lyrics suggest that the speaker feels a deep connection with the person they miss, and that they are unable to move on without them. The line "Sleep alone and it's so hard, darling / You're next to me in my head" reflects how the person they miss is still a constant presence in their thoughts and dreams, even though they are no longer physically present. The song also touches on the theme of regret and wishing that things had been different. The line "If you'd only share this hell / But you leave, and stains are left on me" suggests that the speaker feels that the person they miss has left them with emotional scars that they cannot heal on their own. Overall, "Wish You Were Here" is a heartfelt song about missing someone and the pain of being separated from someone who was once an important part of your life.