OP can I just tell you about my story, which starts off similar to yours.
I took out a consolidation loan whilst I was dating my now DH.
I had some credit cards/store cards and interest was stupid, so took out an affordable 5 year loan.
All good, paid it every month without fail.
We moved in together.
Payments continued, statements arrive at the house. They are only opened by me then filed away.
This is where our stories go different directions
We get engaged. I didn’t think to tell him.
We look at our finances to start saving for a wedding. We look at our outgoings, and I say ‘I’ve got a loan repayment of £120 per month for the next 2 years. Not ideal but it’s from before we got engaged’
He was a bit annoyed. Do you know why? Because he was upset I didn’t ask him to lend it to me/pay off my debts instead of going for a loan.
There was no shouting. No ‘get out/come back now/jump this high at my will’ because he’s a normal person, and he loves me.
He didn’t throw me out of the house we live in together.
He didn’t make me sleep on the sofa.
He didn’t demand to look after my money.
He didn’t call me irresponsible or accuse me of basically ruining his life.
Because he’s a normal person and he loves me
Who even bats an eyelid over a personal loan these days anyway?
Please don’t give him access to your money. If separate finances work for you then let it continue for now.
I’d also say pay off his parents ASAP as he’ll hold it against you forever.
Please have a long hard think about ‘his tendency to overreact’
He won’t change, in fact it’ll probably get worse. Do you want to live like that forever?