Fraternization in USSF

This is a throwaway account, I just really need advice. I am currently enlisted talking to/dating someone in OTC. We are not in the same career field. I would like to know whether or not I have to worry about anything illegal here. I know it’s technically considered fraternization, but one of my supervisors said if we are both cool with it, just keep it secret and one day get married. What do I have to worry about here, or is there anything that we should do to make sure that our relationship is fine? Thanks for the advice in advance!