Ladies and Gentleman. Dr. Des' Guide to TOTAL peace in finding a partner.
Step 1: Find somebody at church or the local, Christian-owned Coffee Shop (Like that girl who works at that place in Kingsport, TN...rawr)
Step 2: Talk with them to see if you get along.
Step 3: Date them many months. Years even.
Step 4: Pray really hard for conformation and TOTAL peace
Step 5: Talk with the local spiritual guru (preferably a nosy woman who can analyze both of your faults). Have them evaluate your relationship with their holy dowsing rod. If the rod shakes in your presence, God is positive about your confirmation and you're on your way to TOTAL peace.
Step 6: Date a few more months consulting the guru at regular intervals.
Step 7: If confirmation and TOTAL peace has not been achieved at this point, you have to pray REALLY REALLY hard. To the point, you break blood vessels.
Step 8: Receive your Letter of Divine Confirmation. It will descend to you in a golden envelope with the wings of a dove. You may or may not hear an angelic chorus.
I think they should personally hold off a little while and ensure that this is God directed and God confirmed. Maybe they have asked and already received an answer and confirmation. I don't know. It is an awfully big decision to make and I personally would only want to marry once and for it to be forever. I hope they are not just running on emotions. It certainly looks that way on the surface but perhaps like you mentioned they have peace. I wish them both the best.
I personally wouldn’t recommend rushing to get married. I’ve seen more stories than not where it does not work. My step brother and his wife got married after two months dating and have been together for about 25 years. They both just knew they wanted to be together forever. I guess if both has TOTAL peace from God, why not?