unfortunately people just have to get a loan to pay it... its just the way it is yearly payment, even if you manage to get it split into 2 or whatever you are still liable to pay it all. as a woman you cannot sponsor anyone unless you are a teacher or lawyer doctor or engineer etc.. sometimes your company may be able to help with that.. but its not a given. also you cannot legally live together you should be married.
A lot of people are in your situation. The options are to borrow the money from a friend/relative or else you need to get a bank loan, which unfortunately comes with interest.
Are you and your partner married? You will not be able to sponsor him if you are not married.
You mention he is in the UK, he can come over and do visa runs for a few months through Al Ain or else through Oman with Rotana Jet if he has a British passport, without you needing to sponsor him, while he looks for a job.
We could not afford it either to pay upfront. That's why we took out a personal loan. But you get studio apartments in Khalifa City A from 25 - 45 thusand