The song in question is
Rick Astley - Never Gonna Give You Up
Because:
not sure if you like this
expecting to end with a kiss?
Sounds like a love song, so it should "end with a kiss"
video? You saw it.
even shared it a bit?
Everyone saw it :) Many also "shared" it by trying to rickroll others.
ranting on the web somewhere
going to give you a little scare
Hides in the darkest places in teh web just waiting to attack you by an unsuspiciously looking link provided by your friend.
once it was a love song
now? Just a click gone wrong
It is a love song, but now it is used rather for rickrolling (one wrong click) than actual listening.
not adding this verse as a prank
actually I did, I'll be frank.
By giving a reference to this song, this can actually be seen as a(nother) prank.
give you a hint? I'm very picky
I tell you it's not sung by Martin, Ricky
This is a song of Rick Astley, not Ricky Martin
very confused about it right now?
explanation is in here, somehow.
The first letters of the sentences start with: nevergonnagIveyouup
young people know it.
old ones at one point enjoyed it.
Young people know it from rickrolling, older people enjoyed listening to it when the song was young.
unable to find something wrong
unless you try sing along.
please find the name of the song.
probably reference to some of the lyrics - as OP says - it is not a hint itself.
