An electron absorbs energy from a photon and gets excited. It gets promoted to the next energy level. It is meant to stay at that level until the system loses energy and the electron comes back to its ground state.
There is a beautiful excitement in the mysterious feeling that every person feels once in their life. When everything seems to start and end at that same person. When every act of yours goes in favor of only one person. When one person takes the most priority in your life. That is the only time when you had some target to achieve. The only time you thought that you were alive. The only time when you lived for someone else. The time when only his/her presence seemed to satisfy your quench for immortality. Ah! No means can ever describe the excitement unless you dive into it yourself. Everyone is your friend. The days are endless and the nights are sleepless. You begin to believe in miracles. You begin to think that it is everything. Every happiness you ever wished for. Every material thing that you can ever own. Every dream you ever saw seems to come true. The song you have been listening to finally starts making sense. John Keats is your favorite poet now. It's the most amusing ride. You think that you have mastered the secrets of life. Nothing can go wrong now. Everyone warns you of an incoming storm. You avoid all the signs. You act unaware. You have placed all your bets on him/her. All your happiness depends on him/her.
If you are in such a state; I tell you, my friend, you are in an "Excited State". Only a few lucky ones get a chance in their life to achieve this state and only a rare one to stay in this state forever.
The system is bound to lose energy and push you back down to your ground state. Then starts a very long phase of self-realization. It is then when you realize how comfortable you felt in the world of illusion. All your desires are unfulfilled. You should have never let him/her become the reason for your happiness. You should have been as independent as he/she was. You should have given him/her your key to elation. The person is no more with you. There are no commitments. There are no priorities. You are now self-centered. All the focus is back on you. The focus is on your real dreams, the real impact that you always thought you would make. You realize who are the most important ones in your life. You realize how deep down you have fallen and how high above your dreams are. You are at ground zero. You have to start everything again, a new life maybe! All the excitement is now gone. You are a regular guy/girl now. You stick to your routines. You try to survive life challenges until, hopefully, one day you gain back everything that you lost; obviously, everything will not carry him/her. Finally, one day, you realize the most important recipe of life - "What are you looking for? I will not give you this recipe for free! Strive and learn it yourself."
The thing that surprises me is to see how several people around me fall into this illusion giving up all their aims in life. Several people seem to be falling into this illusion more than once. Believe me, I am not against it, I encourage every person to do this at least ones in their life. It's definitely worth sacrificing your own dreams and happiness for someone else even if you get nothing in return. This is exactly what the world is based on. What is life anyway?