This truly is another example of how the world just isn't fair. 

Former Boston Bruins forward Jimmy Hayes, a devoted husband and father, passed away unexpectedly on Monday morning at the young age of 31, leaving behind a grieving family as well as plenty of former teammates and friends. 

His wife Kristen posted a heartbreaking update on Instagram earlier today: 

"My angel I love you so much,” Kristen Hayes wrote Tuesday on her Instagram Story, over a photo of Hayes holding the couple’s two sons, 2-year-old Beau and 3-month-old Mac. “I miss you. I don’t know how I’m going to do life without you. You should be here. This isn’t fair.”

His unexpected passing has resulted in an outpouring of tributes from his former teammates, his former NHL clubs, and his alma matter of Boston College, whom he helped to a national title. 

His brother Kevin Hayes also wrote a heartfelt post on Instagram after losing "my best friend." 

He wrote, "My whole life it has always been Jimmy and Kevin or the Hayes brothers. I have followed you around since I can remember and I wouldn't want it any other way."