Bees are pretty damn ugly too; but try living in a world without them in it.
Some creatures that live around us are good for us. It's not a matter of 'respecting life' - it's a matter of if I let that spider live and build a web in my kitchen corner, it will trap flies that could spread disease in my food, and then eat then kill the flies so I don't have to worry about it. It's a matter of putting an earthworm back onto the grass when it strays, so that it will oxygenate the soil for me and make my plants better. It's creating an environment suitable for bees so that they will pollinate my food.
They're creatures that do your favours. Return the favour by overcoming a silly irrational fear, and not killing them. I get really angry when people kill spiders. There's just no reason at all for you to kill it.