0. True love doesn't exist. It just sets you up for failure. Everybody comes with their rough edges.
never give up...that person is out there..keep looking...
Certainly by thirty or after 50. People inbetween are toxic
The age when you die! (never)
Don't bother starting to look in the first place. Just be happy with what you've got and you will realise you have true love.
Don't give up, love can be a corner, street, or even a door away. Never give up!
I would like to say never but at some point you need to realize its not going to happen. I say you should give up if it you hit 100 years old and you haven't had any luck.
Would you like an actual number? Let me think .... 99 maybe?