First of all, you have to find a way to confirm how much your credit card owes. The key to all the problems is that you have to figure out what the money is for, which is very important! Knowing the type of consumption can make the problem bigger or smaller and unnecessary, understand?
Secondly. We should talk to his parents about these situations and try to get him to cancel his card. Credit card cancellation can only be done through the telephone hotline. You can supervise it.
To tell the truth, according to your description, I think your lover is irresponsible and dishonest (please think carefully if this evaluation hurts you), so I suggest you leave more room for yourself. We are not emotional experts, but after all, you can't live like this. The important thing between husband and wife is trust. Without trust, you have to be transparent and open, otherwise problems will accumulate.