As an air traffic controller at a very busy en route facility I can hopefully offer piece of mind. Air travel remain by far and away the safest mode of travel. Aircraft have redundancies in great number (i.e. more than one fuel pump, altimeter, Hydrolic systems, etc.). Air traffic uses a mosaic radar system meaning the display comes from several secure radar sites instead of one like the old days. We also have a computer dedicated to look at radar data and project possible conflicts hundreds of miles in advance all aside from air traffic controllers looking at it directly. Aircraft also have thier own radar systems that are phenominal.
It is a human made system so failures are prone to happen, but so many precautions are made to ensure the safest air travel system in the world (Europe also uses our systems Kchick). Relax and enjoy your flight!