Go and book an hours lesson at your local flying school, understanding how it all works will give you a massive confidence boost, and realize that if you do suffer engine failure etc that you won't just plunge out of the skys. Modern aircraft are unbelivably reliable, and have 4-5 back up systems for each major component. Structural failure inflight is nearly unheard of, so don't worry. I used to be scared of flying, now I have a Private pilots licence and love every second, I still get a bit nervous before flying on the big jets, but only in a silly way, and as soon as we are rolling down the runway I have a big silly grin slapped across my face