Just butting my head in here.

Lea - It sounds like you really don't want to leave him to cry, so therefore don't. If it distress's you then he will also pick up on that vibe and may get more upset. You do what your heart tells you.

There is a pile of articles on the main site that you and other girls in here may want to read, and you are more than welcome to ask advice in the gentle parenting section as well.

Here are the articles
Babies & Sleep
Baby Wearing - The Benefits
Controlled Crying, Controlled Comforting or Sleep Training
Cuddle Me Mum
The Crying Game

Love