If your H has been gone for 17 months and in an active affair(s) then protect yourself and your child.
Do not inform him of your legal plans. Retain counsel and file. If you are unable to financially support yourself at this time your attny will advise you on what to do.
I second the idea to make copies (several actually) of all your evidence and keep it in a VERY safe place.
Some affairs fizzle on their own and some do not. My exH is still with his affair two years later.
