Split string into sentences by max line length.
This uses a character array but doesn’t use word-wrapping.

var personalMessage:String = "You got this far so we reckon that you could be curious enough to learn a little more, we’ll contact you shortly to answer any questions you may have.";
_root.myArray = new Array();
_root.myArray = personalMessage.split("");
_root.mySentences = new Array();
var currentCharCount:Number = 0;
var currentCharItem:Number = 0;
var currentCharString:String = "";
var maxLength:Number = 65;

for (var i=0; i<_root.myArray.length; i++ ) {
        if (currentCharCount<maxLength) currentCharString += _root.myArray[i];
        if (currentCharCount==maxLength || currentCharItem==(_root.myArray.length-1)) {
                _root.mySentences.push(currentCharString);
                currentCharCount = 0;
                currentCharString = "";
        }
        currentCharCount++;
        currentCharItem++;
}

trace(_root.mySentences.length);
trace(_root.mySentences[0]);
trace(_root.mySentences[1]);
trace(_root.mySentences[2]);

This outputs the following:

3
You got this far so we reckon that you could be curious enough to
learn a little more, we’ll contact you shortly to answer any que
tions you may have.

Split string into sentences by max line length and use word-wrapping.

var personalMessage:String = "You got this far so we reckon that you could be curious enough to learn a little more, we’ll contact you shortly to answer any questions you may have.";
_root.myArray = new Array();
_root.myArray = personalMessage.split(" ");
_root.mySentences = new Array();
var currentCharString:String = "";
var maxLength:Number = 60;

for (var i=0; i<_root.myArray.length; i++ ) {
        if (currentCharString.length<maxLength) currentCharString += _root.myArray[i] + " ";

        if ((currentCharString.length >= (maxLength-1)) || (i==(_root.myArray.length-1))) {
                _root.mySentences.push(currentCharString);
                currentCharString = "";
        } else currentCharCount++;
}

trace(_root.mySentences.length);
trace(_root.mySentences[0]);
trace(_root.mySentences[1]);
trace(_root.mySentences[2]);

This outputs the following:

3
You got this far so we reckon that you could be curious enough
to learn a little more, we’ll contact you shortly to answer
any questions you may have.