Ok so have names changed just for this as don't want it connected to other posts.
DP and I are getting married in August this year. We have been together for 12 years, have 1 DC ages 2, and we own our home jointly.
For years he has been a bit secretive about money, got a bit weird if I asked how much money he had left over after bills etc. We have a joint account and we pay equal amounts into it so not like he doesn't pay his way, but he just whacks everything else on a credit card...coffee, petrol, food shop etc. It builds up and up until it's out of control. I eventually find out about it, we figure a way to pay it off and then he promises to be better with his money, cancel the card etc. He has pretty average credit despite debt years ago but he can only get high interest rate credit cards also so the payments are usually very high. I on the other hand have very good credit.
This cycle continues over and over and we now have an 18k loan which is a consolidation of a number of his credit cards/finance and some other unfortunate large spends when we were short of cash because he took a large pay cut -another thread entirely-. He now has a better paid job again and we are doing ok financially. I thought this was it though and all the debt was just this one manageable monthly payment. We had a very frank conversation months ago after the last lot of credit card debt was discovered. We discussed remortgaging later in the year and take some equity out of the house to get rid of it. However I have since found out he has 2 credit cards each with 1K+ on (he told me he only had about £300 on 1, and last month he took out an 8.5k loan!!! He has at least paid off the credit cards as the payment on the loan is much less than the credit cards, but I don't know how he was planning on explaining the extra 6k. He has also booked us a holiday for next year which he doesn't know I've seen the paperwork for. That still leaves 4k. I also don't know how he was planning on explaining the loan when we came to remortgage.
I first got suspicious because he started spending money on clothes, not expensive really but I know he wouldn't have much spare cash. He also gave me his card details to pay for something for the wedding which he said was his credit card (that we would pay off with the money we were waiting for) but they were in fact is debit card details, this was £500 and I know he definitely wouldn't have that much spare.
Our wedding is costing under 3k and we have had money gifted to help with this anyway so no financial pressure there. There's less than 1K left to pay.
I have confronted him about it last night and he has done his usual deny deny deny. I haven't shown my hand yet on how I know 100% (bank statement) but I've told him something has shown up on my credit report as he is a linked associate. Still deny deny deny. He's stated he was 'just looking' and applied for one but cancelled it before he received any money as the rate was different after he'd gone through the application.
We didn't speak for the rest of the night and this morning has been frosty. He's gone out for a bit and I've sent him a long text basically saying I'm not angry about the actual loan, I'm angry about the denial. That he must thing I'm a right mug, I'm insulted he things I'm so dumb. I said I'm not prepared to enter a marriage based on lies and he's basically text back saying, we'll make sure you do it today and text everyone to let them know. So he's calling my bluff.
Still complete and utter denial 🤷♀️ like, HE is the dumb one isn't he?? What do I do? I really don't want to end things, I love him very much and things are good in every other aspect. But I just don't get why he takes me for such a mug when it comes to money/hidden debt.
(Also large debt can seriously effect my job...I've applied for a new job internally and will have to go through more strict vetting if I get it, and large debt can apparently leave you open to bribes so I would probably fail it 
)
Sorry for the extremely long post.