When I was a senior at my high school we started a FIRST robotics team. It was a lot of fun, we had a lot of fun people involved. There was this freshman who was really outgoing and fun- I liked to talk to him because he was funny and seemed like a really happy guy.
Two years later, he unexpectedly committed suicide after the robotics tournament that year. Just because someone may seem happy and outgoing doesn't mean that they aren't troubled on the inside. It was really sad, I miss that kid.