There's a fine line between the clingy cav to a cav who is experiencing separation anxiety.
While cavaliers love people and want to be around people whenever they are nearby, a cavalier should still be able to be left without getting anxious.
If your cavalier cries for two hours while you are gone, it could be experiencing separation anxiety. There are strategies and techniques to overcome this unhealthy dependency. I'm sure if you do a search on the board you will find some tips.
Cedar (tri), Willow (blen), & Holly (ruby)