How do I get my 13 month old to sleep through the night? Do I let him cry it out? And for how long?

I went through the same thing with my daughter and it is not an easy thing to stop but worth the hardship. She would go down in her own bed at 8 (after falling asleep on either me or my husband), wake at 9 cry until lifted and would only sleep again if with us and this could take hours. In the end, for the good of our relationship, when she woke I would just go into the room and lay her back down and then sit in the room, not holding her, not talking to her, just settling her back into bed every time she got up. I ended up sleeping on the floor of her room until she got the message that I was not going to lift her, talk to her, feed her or anything else. It was a fortnight of screaming from her and tears from me but well worth it. She now goes down at 7.30pm and don’t hear from her again until 7am. Good luck and stick with it.