It's deeply sad how Season 5 just cuts Gunn out of the equation altogether, to the point where Fred dies and Gunn is made to feel responsible for the whole thing (and basically tries to commit suicide by offering himself in Lindsey's place in that creepy hell dimension)
And I do think Lilah meant a hell of a lot to Wesley
He tried desperately to burn her Wolfram & Hart contract in S4 finale to free her of them. That's love.