Your friend's sudden withdrawal after intimacy fits a classic PTSD pattern, especially so soon after a trauma like that car accident where someone died. PTSD often ramps up avoidance behaviors right when vulnerability peaks—intimacy can trigger overwhelming guilt, shame, or flashbacks tied to the crash, making connection feel like a threat. He deactivated the platform not because you did anything wrong, but because his brain is in survival mode, slamming doors on anything that risks more pain or exposure. Research on PTSD shows this ghosting-like shutdown happens frequently in early post-trauma months; it's not personal rejection, it's faulty wiring hitting the eject button.
You're hurting because it feels like abandonment after two decades of knowing him, and that's valid—but pinning it on yourself is a distortion that keeps you stuck. Challenge that logic: What evidence do you have that you caused this, beyond your own self-doubt? None. His diagnosis and timing point squarely to trauma symptoms disrupting daily functioning, including relationships. Pushing for contact now will likely backfire, amplifying his avoidance.
Give him space without self-sacrifice. Focus on your own boundaries: process the hurt by journaling triggers in your interactions or practicing grounding when rejection thoughts spike (like naming five things you see right now to pull out of emotional spirals). If he resurfaces, set clear expectations upfront—no vague intimacy without discussing his PTSD management. Evidence-based approaches like prolonged exposure help survivors face these avoidance traps long-term, but that's his accountability.
Realistic outlook: He might reach out when symptoms stabilize, or he might not—prepare for both by rebuilding your emotional independence. What specific boundary will you set if he does contact you?