"Not an hour goes by where I don't think of you and miss you," Riley wrote in a July 12 Instagram post. "It's been two years today since you left and I still can't believe you're not here. You are so loved my Ben Ben."
"We prepare ourselves so rigorously for the entrance and have no preparation for our exit," she added. "So I'm so grateful for this community and to be able to contribute what I can."
If you or someone you know needs help, call 988 to reach the Suicide and Crisis Lifeline. You can also call the network, previously known as the National Suicide Prevention Lifeline, at 800-273-8255, text HOME to 741741 or visit SpeakingOfSuicide.com/resources for additional resources.