Automatically Format Cells On Enter

I'm trying to write a macro that automatically italicize the a range of cells when you select a cell, and de-italicize it if you click it again. In this example, when select B12, the macro will automatically select B12:H12 and italize them. And if you select B12 again, it will automatically select B12:H12 and de-italize it.

This is what I have so far:

Private Sub Worksheet_SelectionChange(ByVal Target As Range)
MyAddress = ActiveCell.Row
If MyAddress > 11 And MyAddress < 159 Then
If Not Intersect(Columns(2), Target) Is Nothing Then
Intersect(Columns(2), Target).Resize(, 7).Select
End If

Select Case Target.Font.Italic
Case "True"
Target.Font.Italic = False
Case "False"
Target.Font.Italic = True
End Select
End If
End Sub

The code above does not work correctly.