Have you ever thought about getting a prop? Something physical that you can look at that may evoke those feelings again?
For example, I received a candle that had a 'mystery' ring inside of it. Once the candle burned, the ring would come out. The ring I received looks like an engagement ring. I wear it at night (its too big to sleep with it on), and the feelings of being engaged, loved, etc. come about. Just a thought.
"Believe in what you feel inside, and give your dreams the wings to fly
You have everything you need, if you just believe" - Believe, Josh Groban
its hard to have a better tomorrow if you're still thinking about yesterday