Sharing accomidation at Unite Olympic way with my boyfriend.

My and my boyfriend would like to share, however my parents are extremely strict and would never allow this. I was planning on keeping it secret until I found out the gurantor sees all the documents. Its not the price thats a problem, just the fact Id be living with my boyfriend. How do I hide this from my parents, because im guessing when i go to sign the papers the person there will mention im sharing with my boyfriend. The only other thing i could think of was private accomidation that's not through MDX. And i think the person handling the accomodation would find it quite amusong of i asked them not to mention im living with my boyfriend haha😅