You only THINK you are not distracted, believe me, you are not focused for several seconds at a time and one day you may pay for that with a life, yours or someone elses. That is why paying this fine should be much easier to accept and be a lesson learned (deterrent).
I am not coming down on you, we are all guilty of breaking laws at times, some can cost lives and some don't. This instance should be a cheap lesson and help save your life, however from what you say I think you may very well be texting away again.
All the best to you, no text is worth a ticket, accident or a life, just keep that in mind. Unless of course you are Jack Bauer and the text stops a bomb or something lol