Don't be scared.
Aviation has so many failsafes for our own safety.
If one engine cuts out, the plane can still fly and land with one.
[..]
Along those lines:
A skilled pilot can do a surprisingly good job of flying a plane without any working engines at all. They are remarkably safe nowadays and glide a lot better than most people would expect from something weighing hundreds of tonnes. From a standard cruising altitude of a large passenger aircraft, you could probably get as much as 100 miles of gliding range, which will very likely be enough to get you to a usable runway.
They can also fly and land without a pilot, so you're covered both ways.
You'll also have at least two pilots and other safety precautions such as them being required to eat different food (to cover the unlikely possibility of food poisoning).
They have safety precautions for the safety precautions.
You might find it helpful to check this for yourself, to strengthen your rational understanding of the degree of risk involved in flying (which is minimal - it's the least risky way to travel any significant distance). That might help you gain some control over the irrational part of your fear of flying.
It would probably be a good idea to make sure you
don't have a window seat. It's much easier to ignore the fact that you're in the sky if you can't see it a foot away
I've spoken to a few people who were disappointed with flying because it was mundane. They were expecting it to be different to other transport and it wasn't really. Sure, you're travelling at 550 mph at 35,000 feet, but there's no tangible indication of it. There's less sense of motion than there is in a train.
But it's a common phobia and you can get medical advice about it and possibly, if it's advisable, suitable prescription drugs. It would be a good idea to see your doctor for advice.