Because he's probably deeper in debt.

You chose the "Cool" guy who is a rebel over the "nerd". Classic choice of brawn over brains. You should have compromised and found the trade school guy who has little debt, great skills and is smart enough to stay out of jail.

And today OP learned that "bad guys" have Bad Guy Problems. Time to pull the ripcord before BF's problems become YOUR problems, OP...

Unless the credit card account lists your name on the account BF’s debt is not your problem… I definitely agree that being attracted to “bad boys” is stupid and brings you bad problems. Kick his ass to the curb, change the locks if the lease is in your name and block him on all social media and your phone. Wise up - Is this how you want to spend the rest of your life? … Get counseling if you can to help you understand why you make these choices and how to avoid them in the future… By the way 30k in credit card debt with no income and no prospects is a much worse than twice that in student loans but with an actual career.

if you would have went for the dentist he most likely has 150k in student loan debt so either way you could have been screwed.

I can't believe you kept him. For me, being incarcerated is a dellbreaker unless you are heavily entrenched. Statistically that guys life is about to become way harder.

It's your boyfriend, not your husband. Meaning his credit card debt is his responsibility alone. Unless you're married, you don't have shared assets. Unless the card is in both of your names, in which case, YDI for not monitoring it.