KeepFollowing is an addon that will force you to keep following if you stop following and get back in range of the person you are following.

I made it for multiboxing, but will still work for a single character as well.

----
Basic Commands
----

/kfollow
-- will keep following the person you are targeting

/kfollow stop
-- will stop keep following (will not stop regular follow)

/kfollow tell grab,<playername>
-- will make <playername> keep following you (great for dual boxers)

/kfollow tell forcefollow
-- will make the person you are targetting regular follow you. (great for afk'ers)

/kfollow tell stopall
/kfollow tell stop,<playername>
-- will make everyone or the person you specify stop auto following
-- blizzard will not let a macro stop you from following your current person
-- but once they move or get out of range, they will not keep following

Anyone can whisper "!kfollowme" to you, and you will attempt to keep following them if they are in your group.

(still confused?, just try it out! it's easy)
*note* "/kfollow tell" will only work if the other people in the group have the addon also.

----
Other Commands
----

-- for help with mount support go to http://wow.curseforge.com/addons/kfollow/pages/mount-support/

/keepfollowing
/kfollow help - displays help menu
/kfollow leader - follow the leader
/kfollow player <name> - follow a character by name
/kfollow target - follow your target
/kfollow focus - follow your focus (added 01.08.08.22)
/kfollow stopmessage - debug on/off
/kfollow stopwhisper - stop following whisper on/off
/kfollow partyalert - alert the party of follow status on/off (added 01.08.11.23)
/kfollow allow - enable/disable following
/kfollow tell <allow,who,followme,followleader>,<on,off>
/kfollow allowtell - allow party commands for your character

Examples:

/kfollow
follows current active kfollow target, or the target you are currently looking at

/kfollow stop
stops you from following anything

/kfollow leader
automatically starts following the leader of the party

/kfollow player <name>
/kfollow player Necrosniper
automatically look for Necrosniper, and start following them

/kfollow target
same as /kfollow

/kfollow stopmessage
this will toggle debug/messages

/kfollow stopwhisper
this will toggle having the followee whisper the person its following

/kfollow allow
this will toggle the the following capability of /kfollow

(For Multiboxers, or Partygoers that want people to follow them)
(As long as the party member has this addon installed you can tell them to follow you)

/kfollow tell <allow,who,followme,followleader>,<on,off> -- <grab,playername>
/kfollow allowtell

Examples:

/kfollow tell grab,Necrolight
This will make Necrolight follow your character

/kfollow tell allow,yes
Allows all party players with the addon to listen to follow commands

/kfollow tell allow,no
Dis-Allows all party players with the addon to listen to follow commands

/kfollow tell who,Necrosniper
This will make all party members follow Necrosniper

/kfollow tell followme
This will make all party members follow the person who uses this command

/kfollow tell followleader
This will make all party members follow the leader of the party

/kfollow allowtell
Toggles the tell to be used on your character

/kfollow allowtell no
Disables anyone from controlling your character with party commands

----------------------------------
-- Macros I use for my Multibox --

Macro 1 (On the leader) - My Main Follow Command:
/kfollow tell grab,necrolight

Macro 2 (On the leader) - My Stop Following Command:
/kfollow tell stop,necrolight

On character one I have Macro 2 bound to a key.
On character two I have "Move Backwords" set to the same key as char one.

In combination, its like having a hunter stay button and follow button.

--------------------------------

Thank You for your suggestions: Tizer & skipmayfield

I'll be sure to implement whatever suggestions I get.

Thanks, and have fun.