You have to pick an option. It is an a vacuum so no "what if" or "can I" stuff.
Option A - You get the spend the next year with the person of your dreams. It will be the most awesome year of your life. You will travel to the coolest places and see things you may never see again. The sex will be the best you've ever had and you will never tire of it or that person. However after a year, it will be over. They will vanish and you will never see them again.
Option B - You can choose a person to spend the rest of your life with. They will be dependable and reliable, safe and trustworthy. They will always have a steady income and always "be there". However, the relationship will be lukewarm in terms of passion and excitement.
Pick an option and EXPLAIN why.