I just read someone's post saying he wants someone to love, and he's depressed because he can't find true love.

Then, some people tried to "help" him saying "love is not everything, i had love before and it doesnt solve it"

You.
Do.
Not.
Help.

You don't help saying someone that "love is not everything" (when someone who has never experienced love hears this, it means that all they wish will never be achievable) and then "i had love before and it doesnt help" (basically you are reminding a lonely person that he never had the opportunity of being loved and probably never will, while you had one or many opportunities, it just feels terrible that others can have the opportunity and for some nonsense reason you can't, its really unfair and demoralizing)

Let people try love, let people live experiences, dont ruin them saying that what they wish is crap, it doesnt help at all, even if later they try and fail and it goes wrong. At least they will go through that stage of life, because humans can not live without love