Oh dear ! same thing here ...first husband denied affair despite like youself finding receipts for jewellery, hotels meals etc ....in his case he was a compulsive gambler and only had a private credit card on mine which I paid for.....think he was too stupid to realise I also got the statement ! He also used his company card as he went abroad on business at lot (sometimes I knew where he had gone and who with (a male colleague) as I drove him to Heathrow and collected him ...although there were often foreign women's names and phone numbers in his brief case when he returned ...I left them there, just altered one or two digits in the phone numbers.....but the last affair he had was long term (denied of course) I went round to the woman's house and spoke to her and her husband, who said he thought it odd as a friend of his had told him he saw his wife in Brighton (of all places !) at the weekend (my husband was supposedly at a weekend conference !) .....so I left a message at the hotel (found the number in his brief case before he went, as I was suspicious _ for him to phone his wife !! The man on the desk thought this was hilarious as he had signed in with the other woman as his wife .......he came home ...so I said don't bother to unpack ....on the Monday I had the locks changed and went to see a divorce lawyer for whom I had worked for a while .......
Best advice ...don't get mad, get even ...though at the moment it is raw and hurting ...be prepared ......make a file (don't keep it anywhere he may find it) of anything and everything you have contributed to the marriage ......receipts, bank statements, etc etc and if you have it, details of his employment, salaries, savings, investments, even insurance policies and likely pension) as this will stand you in good stead if you decide to divorce him. Meanwhile, you can also explore your options for living alone ..ie retirement village, somewhere near the family, friends, etc etc ...hopefully you will never need any of this, but forewarned is fore armed ...and then and only then, when you know what is feasible you can confront him ...or rather initiate a 'friendly' discussion about your future together ...... go see a divorce lawyer see what your entitlement to legal aid and maintenance if applicable, would be ....so you can work out what you would have disposable to buy yourself a flat or some such and to live on Don't forget now you are also entitled to some of his pension ........good luck !