I know of someone that married an unbeliever, and wasn't marked. She was also a Pioneer, and served at Bethel as a part time helper from time to time. She also divorced her 1st unbelieving husband later on and married another unbeliever. Some of the Elders tried to snoop into her affairs, and she told them to but out, it was none of their business. The family moved away from that congregation and did much better in another congregation.
Then again, in my very own cong I know of a sister that intended to marry an unbeliever. The Elders did have a marking talk as was indicated above from the Org Book. However, in her case, her name was mentioned. This didn't coincide with the instructions in the ORG book. She did marry this person, and of course the family members who served in some capacity didn't attend. They were also instructed not to give a wedding gift. Later on the family member who did serve as an Elder, resigned as an Elder, even after obeying this counsel. He had just enough.
After you are married, the deed is done. "What ever God has yoked together, let no man put apart". The Elders have a narrow window to put pressure on a person to stop this sort of engagement, but when it is finalyzed, it's a brand new chapter.
Congratulations by the way, and may you have many happy years in your marriage.