I have a wonderful life
I've gone from being desperately poor, alone, and insane to living a comfortable middle class lifestyle, having a loving marriage, and being level-headed.
I wish it could go on forever. I love my wife so much it's hard to relate in words. I'd rather die than see her suffer. I know she's suffered in the past and the thought is painful to me. To think that she ever felt alone makes my heart hurt.
I know this love can't go on forever, though. It might last another 50 years if we're lucky. We're in our early 40s. I envy those of you who are certain that there is something after death. I just don't know for sure and I'm more inclined to believe that there is nothing.
I shouldn't be worried about this stuff at all right now. There is so much more ahead of me barring bad luck. But I keep having this poignant feeling of the fleetingness of it all. I just wish I could stay in love forever.
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That somehow you will always be in love and in touch with them. I can't explain it.
But I feel it.
Love is a powerful emotion, one that I believe withstands the passage of time, and of life.
for however long 'forever' might be for you.
Its wonderful to hear this from you.
I love my husband so much. I understand just how you feel...like it should somehow be able to live beyond all this. I was alone for many many years, and I know how very fortunate I was to finally find this person, and this life together with him. I was almost 50 when I met him! I had been in other relationships, and was married a long long time ago. But nothing ever felt just right. No other relationship made me feel like I was with the exact person I was matched with, as perfectly as pieces to a puzzle fit together.
I wish that everyone who wants a relationship could find a really good one. One that is just right for them.... Someone they really love & like, and someone who really loves & likes them. Just the way they are.
There were so many times in my life that I thought it would never happen. I was so sad thinking that. I've been with him 15 years now, and I love him more as time goes by.
After many years of a pretty contened single life, good job, etc. I met Mr. Dixie ( online, yet) in a very casual encounter.
Not looking, no intentions of anything...
and yet...
15 years have flown by.
I think, by now, he is a keeper. 
I'm really happy for you & Mr. Dixie. "Online" has worked out for many more people than I ever imagined. It has brought together some great couples. 
i just want to tell you that if i hadn't been at the receiving end of some pretty unique experiences i'd be completely skeptical of anything other than the "when you're dead you're dead" mindset.
and without launching into my laundry list of examples and experiences i will say with certainty that there is life after this life
(i also believe that the life we are currently in is not the first incarnation we have had, and that we travel in soul groups, plan incarnations, decide on the relationships and roles we will have with each other, and what lessons we can help teach & learn from one another, as well as the joy and happiness we can share)
and, i believe, it is love that keeps us connected to those who have moved on before us; our love for them and their love for us. i believe they either stay with us or move around us or visit every now and then because of their love for us.
"we are not human beings having a spiritual experience; we are spiritual beings having a human experience." --pierre teilhard de chardin
you said "i know this love can't go on forever" -- i think you're mistaken.
your situation / circumstances will alter with time as you grow older (changes in a job, housing, health, physicality, etc.) but love is the one thing that *can* go on forever.
and it does.
of course, i don't expect you will drop all skepticism and suddenly believe what i'm telling you. (but you'll find out--eventually) 
check out "through the wormhole; season two"
disc one: is there life after death?
you could probably order it through your library
it looks interesting.
http://www.amazon.com/Through-Wormhole-Morgan-Freeman-Season/dp/B005F0TH2C/ref=sr_1_5?s=movies-tv&ie=UTF8&qid=1393734666&sr=1-5&keywords=through+the+wormhole
I hope you live a long, healthy life!
I think my OP would be better (and make more sense) here as a reply:
Whether or not the afterlife exists is irrelevant. Death itself is irrelevant. Living for now is what matters.
Worrying about death is pointless because A- it's inevitable, and B - No matter what your beliefs, it probably works out in the end (through either non-existence or being together as spirits forever). I prefer the latter, but wouldn't mind the former (purely by not having a choice in the matter 
).