My dad passed away when I was 25, it's tough. Lots of emotions, I looked like I took it well but I had a lot of anger more than anything but also a lot of regret. I'm sure bottling things up didn't help.
I hope Matt takes all the time he needs. It will get easier over time but the pain never fully goes away. It's been over 6 years for me and something random will remind me of him all the time.
Seriously folks, just make more of an effort to spend time with your loved ones. I never thought "my dad was too young, he shouldn't have died", he had a lot of health problems and while it was fairly sudden when he had his stroke (he died a week after having it), it wasn't shocking either. What did hit me the most was how I wish I had spent more time with him when I could have. You get busy with your life and think you have all the time in the world but you really don't.