No, if you did not lie on the application or otherwise to the landlord (e.g. even if it was not on the application, if prior to the lease being signed, he asked you about criminal records of anyone living with you) before the lease was signed, then you cannot be evicted for the fact that your boyfriend has a criminal record. Of course, the landlord could choose to not re-rent or renew your lease when the first lease if up, if he becomes aware of this (though if you and your boyfriend have been good tenants, that is less likely), but during the lease term, you can only be evicted for the usual, fairly obvious things, of which far and away the main ones are: failing to pay rent; causing damage to the landlord's property; violating lease terms; engaging in disorderly conduct disturbing anyone else living in that building.