Divorce counseling is very helpful for people who would like to be somewhat amicable for their kids and who both are on board with divorce. If you both want that I'd follow through but that doesn't seem to be the case here. You need to find out exactly what this appointment is for. MC, divorce counseling or discernment counseling. If it's discernment counseling I strongly, strongly suggest you get on board. The other 2 not so much. You're not all in on a divorce there's no point to divorce counseling for you. She's not all in on staying married there's no point in MC for her.
As to the GAL, #1 where did you get the impression GAL meant dating? #2 Wtf was your life before marriage? Look I'm not a prude and my H's body count is frighteningly high, so please don't take that as judgement, but when they say taking your life back they don't mean taking it back to your early 20s. More like who you were you when you were seriously dating but not living together yet. Getting a life doesn't mean new love life or voracious s3x life. It means a life that isn't wrapped up in your spouse's coming and going. One that isn't wrapped up in your MR. You know you can like go out and do things and not be trying to get laid. Like people go bowling because it's fun. Or dance because it's fun. Or catch up with old friends over a drink because it's fun.
