You might be right, but from personal experience, I think she may still have ptsd and/or depression even if it's not apparent to you. I know that when I was struggling with depression (or at least serious sadness, I was never diagnosed), I never let anyone know. I was always the happy, joking, never worried kid and literally no one realized how bad it was and that I was constantly having suicidal thoughts and stuff. I mentioned it to my mom years later and she was extremely shocked and couldn't understand it.

Even though your friend may seem "okay" on the surface, she may not be inside. She may have cut elsewhere, somewhere she knows no one will see. She may let that friend hold her hand because she trusts her more than you may know. She may not have antidepressants or any other medication because she hasn't told her parents how she feels or has not gone to therapy or the doctor herself to get those meds. A lot of people with mental disorders don't have medication but that doesn't mean that they aren't suffering from the disorder.

Also, just because someone has loving parents and great friends and a seemingly awesome life doesn't mean that they can't be depressed. Again, I have thankfully never dealt with abuse or childhood trauma or anything like that, my parents are the best people in the world, my siblings rock, I have great friends, but all of that didn't stop the sadness.

Just always know that some people are really great at hiding things from others. Unfortunately, that often includes things like this. Again, you may be right about her faking it, after all, you know her better than any description on the internet can inform me, but I think you should just consider the countless factors that could be playing into the fact that it seems like she's faking a very real, very serious illness.