Possibilities include
Code:
; check text parameters without matchtext restriction
on *:text:*:#chan: {
  if (($1-2 == i love) || ($1-2 == i like)) && ($3 != $null) { 
    [...]
  }
}

; limit matchtext and check second text parameter
on *:text:i l* *:#chan: {
  if ($istok(love.like,$2,46)) { 
    [...]
  }
}


; a regular expression for either case as matchtext
on $*:text:/^i (love|like) ./i:#chan: { 
  [...]
}