Just as the same as you would with anyone else. though if you get married with one try fixing their status because anything can happen and you and her/him could be separated and it will be years before hes allowed in again.
no,you can not
Yes, an illegal immigrant from Bulgaria can get married in the United States. An American can choose to marry whomever they want.
It is legal in the United States for an illegal immigrant to marry a US citizen. Once the marriage is legal, the illegal immigrant becomes a legal immigrant and can stay in the US for the course of the marriage.
No he cannot
Yes.
no way
It's not illegal.
i married in 2005 to an illegal with no valid id only a legal birth certificate from his country! am i legally maried to him here in the US?
If you are married, you can apply for divorce.
no not unless they where married to a USA partner.
The illegal immigrant will be deported when caught.
If the immigrant married a US citizen, then that's a done deal and she is no longer illegal. It sounds like you need to take care of your own affairs, starting with divorce proceedings.