As time passes, you're more likely to fall out of love with your partner. Is this true?

Yes, if you let it happen, then it is possible to fall out of love. Personally, I believe that love is not a one-off deal, a couple has to work at it every day, you need to fight for it. I know it's not the most romantic thing to say, equating love with work but you can't just rest on your laurels when it comes to love. That first stage of falling in love may be characterised by that rush of butterflies, a desire to spend a lot of time together and an ecstatic bliss but as time goes by, people change, circumstances change and if two people in a relationship do not work on their love everyday, then they are more likely to "fall out of love". I spent five years in a LDR with my then-boyfriend and everyday felt like a battle but I never thought once to quit. And just because we're finally in the same country, grateful and in a comfortable place, we have never taken things for granted :)