Getting past triggers?

Hey everyone, this is random ik but I’m trying to get passed a trigger. So, almost a year ago my boyfriend had a bad “habit” and I found out through an app when I clicked on it. Since then I could not download or use that app because i get ptsd from that even and the trauma it led to. I want to use that app for the content and stuff but I can’t get myself to use it without being reminded of everything. The app is called YouTube btw. If someone could help and not judge that would be very much appreciated thank you:)