Mya: You're definitely not alone. My relationship of 5 years does not feel as urgent and full of passion and 'gaze into your soul' moments as the 6 month old relationship does. That new partner and I have quite some sparks going on...lol
Now I've worried about that a bit, only to be reminded that the NRE eventually does fade and gives way to a more settled and comfortable state, like the one I feel with my initial partner.
In the meantime, I'm convinced that Yoda has it right...just DO, lol. Make the efforts, create special times and try to maintain/refresh the connection you share with your long time love. I've been putting more thoughts and efforts in my interactions with my husband and it seems to help me feel closer to him.
I tried being reasonable. I didn't like it. ~Clint Eastwood~