My truck left me stranded today

[corn]

I started my truck this morning like every morning & made a few stops with no problems but I stopped by the bar my son just bought to help him for a while & when I went out my s10 wouldnt start. Cranked & cranked, not so much as a pop. Let it sit most of the afternoon & tried it every hour or so & still nothing. About supper time I hit the switch & it popped right off. Anybody ever had this happen? Its a '96 4.3. I hate the thought that this truck might not be the reliable machine its always been...