Don't disregard your own intuition especially when we're talking about suicide. Trusting our intuition is huge if there's a pull in some ways to check in with somebody or ask them how they're doing and you notice something that feels off. Don't turn the blind eye not saying the thing keeping the secrets under the rug is the at worst. Ask earnest questions instead of accusatory ones like hey uh what are you doing this weekend  which is an accusatory question as opposed to being like I noticed you know you've been sadly ill, which is an earnest question.