If your taking very little food, I suggest taking a gun, you might starve otherwise.
Make sure you take a gun with at least 2 bullets. Then you and your friend have to decide who kills who and then kills themselves when things go horribly, horribly wrong. Which they probably will.
Sounds like a normal backpacking trip for myself. I've just recently started heading out by myself and love it. Here's a pic I snapped while out the other day...
Thought it turned out rather well for my crap camera phone.
*Edit* Forgot to mention that the trip in that pic ^ was cut short when I found fresh bear tracks. I don't eff with bears.
Did you go to a reserve or a mountain range or is that just a local wooded area where you live?