Mandy,dont ever think there is no one here who understands.Read my old posts and look at my signature.Unfortunately there are several wives/partners/carers who have had experience with men folk who have done and are doing exactly the same as Dennis.
Feel free to e-mail me anytime on any subject, and as i learnt no one here will ever censure you for the choices your husband makes,and the support and backup you will get will hopefully help you to cope a little better,and will be wholehearted.

love liz