Not presently in love, however the feeling when it hit me was...comfort. I feel like when I love someone in the way of a relationship that the main feeling that I get out of it is comfort. When in love I have felt happy and in "the correct place" in my life at that time. It might come from some primal instinct where I want to have a mate and it feels good knowing I do. But it also comes from the ability to relax and focus on other pursuits in my life, knowing that I have a love to support me. Simple creature comforts, but it feels good all the same.
Are you able to call up that feeling in a nostalgic way now, when you're not in love? (I'm having this really odd realization tonight, which is why I asked, that I have no emotional memory whatsoever of ever being in love, even though I have memories of all of the peripherals, and knowledge that at the time I meant it and had those feelings.)
Yes, but not quite the same depth. Knowing that you're connected to someone who feels those same feelings adds another level to it. In my opinion at least.