A common pattern I see with people I know who've experienced trauma is when they discredit their own feelings or perceptions toward events when they are venting: "I'm probably being dramatic" or "It wasn't that bad I'm being dumb" or "I'll get over it."

I really try my best to validate them frequently throughout the conversation and encourage them to keep talking about how they feel. I use a lot of active listening nonverbal, head nods and eye contact, and I do NOT look at my phone (I don't look at it during any interpersonal convos, but especially with these friends of mine). I would never want to them to think their feelings and hurt are a burden.