Instead of reassuring yourself that nothing will happen, have the mindset that “whatever happens, I’ll be fine”.
Even if you worry that bad things are coming, create a mechanism to guarantee that you’ll be okay, like figuring out which friends are really supportive and which aren’t, knowing that you can reach out to your family, or just trusting fate. Face the challenges with a serene heart and the knowledge that time can heal anything, so just wait and hope. And be fine.
This is the true strength.