Moving to a new home after many years of living in another one can mean a new adventure, and a new chapter to your life. The reasons for the transfer may vary (marriage, new job, etc.) but I am pretty sure that the transition will never be easy. Emotions have been invested in the old place. Memories were made. It will not be easy to leave the old place behindThis, however, should not hamper anyone from building a new home. The transition may be difficult but it is most definitely possible. You may just need help from their families, partners, or close friends.
The transition does not end with emotional transition, too. There is always the physical aspect attributed to the transfer. A number of appliances, furnitures, and material possessions have to be transferred--unless you really want to start anew that you give everything away. Transferring all the goods and placing them in order can be very exhausting. From strategically placing your furnitures all over the house to putting portraits and wall decors on molding hooks, placing everything back in order will take some time. So get help from the people mentioned above when you most need it.
As for the emotional investment, well, let's just say time itself will put everything in order. Just remember to enjoy your stay and make a lot of good memories while you're there. When you leave your old place, you don't have to leave the good memories with it. Carry them with you in your new house, make the most out of it, and add to those thoughts that will be forever etched in your mind.