How To Continue This Marriage Of Filth And Lies

I have been married for a little over 9 years to my wife, life started out good, we both had good jobs, drive a nice car, nice holidays in 5 star hotels across Europe, life was good and we were happy. Just soon after meeting my wife we found out the devistating news that she had Multiple Sclerosis (M.S), our life was shaken a little but we knew we loved each other and we wanted to be together, I proposed to her and we got married in August 2003. Children followed one in 2005 and one in 2010, by the second child my wife was more reliant on sticks to walk and was quitte fatigued alot, I was spending more time looking after 2 children alone and somewhat a single parent. The first thing to really upset me was my wife gambling £100s away on lottery etc but saying it wasnt her and that someone must have access to our account, after much upset with the bank it was discovered to be my wife, she apologised and said is was hormones after having the children, I accepted this and got on with life. since then she feels she can cover up all sorts of little things and not be honest with me, I have also discovede numerous dirty pairs of knickers hidden because of her week bladder, she uses pads incase of accidents and again I have found them rolled up behind the toilet, no reason is given just one apology after another, she is not aware that she smells sometimes of wee due to her pad wearing, all this goes on whilst she still holds down a full time Senior Managerial position, she is not too bothered about her apperance, as today wore an old pair of trousers found in the botton of the wardrobe, nothing matching and wearing old grey underwear, this is all whilst she still wants an intimate relationship with me, sex had completely gone, I have no interest anymore with her, we have no communication as she has no friends out of choice so has nothing to talk about, what do I do, I am 31 years old, father of 2 who gave up a career 7 years ago to bring up the children and care for my wife, I earn minimum wage in a part time job. I told her last night I want a divorce but I have been brought to this, I am a christian and the lord plays a major role in my life but I dont feel I am the one that has let the relationship down, I think it is my wife. Any advise or anyone looking for someone to spend time with, a nice British guy, 2 great kids, I love walking and the great outdoors, I just take the children out walking alone and so wish I could share that time with someone who appreciates me and I can appreciate x