this fear has been haunting me since I was what? 8 years old? I'm a 20 years old guy now, I'm not afraid of snakes, spiders, rats or any other insects or pests. but when that alien of an insect appears swaying his antennae. I get petrified while everybody laughs at me. it's just something I can't handle at all. it all began when I was sleeping in peace. and a nasty, big roach crawled on my face and stuck his antennas in my nostrils EWWWW. I was 8 then, imagine a friggin 8 years old kid experiencing that! I woke up terrified that day, just like a statue.
i recently began a small baby steps program to get rid of that fear. I was terrified of any roach big or small. but now I can toss away small roaches and crush them (not with my hand or leg though) but I consider it an improvement. although I convince myself that I will eventually reach the BIG roaches step. I know deep inside, that it will never, ever happen. So, how to convince myself that it's just a bug smaller than me and feel my superiority?

Well the great news is that you are overcoming your fear and one day soon, hopefully you can crush that Big Roach by hand

Until then, step by step......

Roaches are fairly harmless. You must realize you are much larger than they are and all they are doing is looking for food of some sort and going about their lives. While I do not have a fear of Roaches and I am able to catch them with my bare hand and put them outside (I don't like to kill them), I can totally understand the fear that a phobia can cause.
Slowly facing your fears is the key. It's fantastic that you are slowly facing a fear. Maybe the next step is more exposure therapy? Maybe try learning about them.
Most of us tend to fear things that are trauma related or things we do not understand fully.
I hope you can overcome this fear.