I'm sorry that you're here...but also pleased to meet you...in coming here you've made a great move!
But you need to give us more background to your situation (sitch) if folks here are going to be able to offer some help...
It sounds like you're fairly new into a difficult situation and struggling to sort out the right thing(s) to do...
IDK - "lay it bare" and there may be some more help on its way...
In the meantime, keep cool, don't do anything rash and at all costs keep your cool with your W (wife).
And on the GAL front - yes - by all means GAL...but IMO don't start making your W think that you're out with other women just yet - you're new to this...things might take on a momentum you can't stop!