il y a longtemps
Some say,a long time ago, that some French family lines are descendants of Mermaids.
You can say "Cela fait longtemps" to convey the phrase "It has been a long time" in French.
i was not invented long ago some people say but some say it was a long long time ago so there is no real awnser
You can start a myth by saying, a long time ago there was a god named..... Or you could say, a long time ago, there was a _____ named____.
lank gelede
Different, but you didnt say how long ago and that's relative. For some of the earliest-see below.
Hace mucho tiempo.
In this case, I believe you mean "we were finished (ended) a long time ago". That would be "Nos terminamos hace mucho tiempo".
some say up to 15,000 years ago
je t'aimerai longtemps.
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a long time ago.......1600,s i'd say. =)