You will have to be in status while the I-485 is being processed if he’s a GC holder. Depending on the visa you entered on, the authorized time might be expired by then. It’s better to do consular processing in that case.

I was denied based on that error so I’m sharing my two cents. Good luck!

@Jamaican Jamaican marrying a US green card holder may not be the optimal solution to address your status in the US. If your boyfriend is soon to become a US citizen, it could be a simpler process. However, in most cases, you may need to go back to your home country for consular processing.

did you already overstay? if yes yiu can marry him and just wait until he become citizen at least by then you’ll be certain about yiur 10yr GC.