Too old for Ferber method?

Keri • "Happiness can be found even in the darkest of times ; if one only remembers to turn on the light"

I never agreed with this method. My LO really knows how to cry like he’s dying when I leave him. I’ve never been able to stick to it because I just feel too bad. Now my LO is 13 months and has yet to sleep through the night. Normally averaging waking up 3 times. I work and am finishing up in school so mommy really needs some sleep. Lol.

Is he too old to be trying this method? I’ve tried everything else so far and I’m really running out of options