Hi - my name is XXXXX XXXXX I'm a Real Estate
litigation attorney. Thanks for using JA! I'll be glad to assist you.
If you're on the lease, you're responsible for the rent regardless of your situation with your boyfriend. I know that goes without saying, but I just wanted to mention it as a matter of course.
Thus, the sooner you can settle with the landlord, the better as that will get you out of the picture and prevent a wage garnishment, bank levy, etc. from being issued against you for the unpaid rent, etc.
The landlord can collect all or part of the judgment from either one of you (as both of you are 100% responsible for the rent), so you can try to settle and then let the owner go after your boyfriend for the remainder.
I hope this answers your question, but if you need any additional information, please don't hesitate to ask. Thanks.