Be ready to compromise. There will be adjustment problems. Your partner might do certain things that drive you crazy. And they will not change it just because you are there so you better get used to it. You both will be financially independent but money matters will be a sore subject. Be clear with your partner from the beginning how you want to settle this and deal with it. The best option would be if you both go dutch.
You might feel a lack of private space when you both start living in because till now you were used to being alone and on your own, now you have to live with someone so be prepared for everything. The only time when living together before marriage doesn’t pose a threat to your relationship is after you’ve gotten engaged, have formally announced your engagement and set a wedding date.
Since you’ve publicly committed to be with each other forever staying together at this point will make your relation more exciting and romantic. Simply think twice before deciding to live with your partner. There is no evidence that if you decide to try a live in relation before marriage you will have a stronger marriage.