What do you think your ministry will be, or what is it now as the Lord has placed you?Will you be able, generally speaking, to serve God better together than apart?Will you be able to accomplish ministry (be it your original plan or one that you have caught a vision for through this person) more effectively together than apart? Look at the roles laid out there for men and women.
For more ideas on this, see "How can I prepare for our wedding night in a God-honoring way? This is important: Don't buy into the secular myth that you are somehow inferior or failing your new spouse if you don't show up as a sexual expert on the night of your wedding. If you are already a sexual expert on the night of your wedding, then you have, somewhere along the way, blatantly strayed from God's design for sexuality in your life. Get solid, biblical marriage counseling, either from the pastor who will conduct the wedding service or from some other person who is mature in the faith and in marriage.
The wedding day is just like every other day in the Christian life — it is primarily about God.
A wedding is a worship service in which two people happen to get married. At the end of the regular Sunday morning service, the two people getting married would either come down to the front of the church or simply stand where they were and take their vows.
In terms of how to spend your time and what to talk about, the main concerns should be to prepare for marriage, to avoid temptation and to keep in mind that That simply means keeping basically the same constraints on the settings in which you spent time together before you were engaged.
In other words, while you will spend more time together, it still should not be alone in one of your apartments.