at least you don't sound overconfident......just fly more solo!
-engine quiting isn't that bad (unless you are 45 miles off shore at 1000ft) ...in-flight seperation - now that's bad. Seriously though... solo flight will probably be the best... and after you get your IR... file on every XC and go solo or with a non-pilot. Don't let it get to you.. just focus and take care of business. You'll be fine!
In the words of several on the forum.......
"re-engage mav, re-engage"