Am I expecting too much of my best friend?

Over the past month my closest and most trusted friend has stopped contacting me. Under normal circumstances it might not be a big deal, but recently I confided in him that I was extremely suicidal (more than usual). I confessed that I had stopped taking an extremely important medication and was instead secretly storing the pills to kill myself since all the medication in the house is locked up. He's seen me go through several suicide attempts in the past, but even now I've always tried to not lean on him too much. He knows I have an eating disorder, panic attacks, hallucinations, and have learned to rely on cutting. He knows that I don't trust my doctors, parents, or other friends enough to tell them the truth.

My question is this: am I wrong to be hurt that he would disappear without a trace when I told him how suicidal I was feeling? If the tables were turned for anyone, even a stranger, I would never leave them alone and hopeless like that. To me, it feels like he said "I don't give a **** whether or not you die." On the other hand, I know my problems can be overwhelming and despite my extensive efforts to shelter him from the reality of my life he could have felt like he couldn't handle it. Do I expect too much from him? Am I being too sensitive or has he been a horrible friend?

Just so no one is worried, I have my depression under control and I'm not in any immediate danger.