I would suggest looking into getting a job, maybe not for the money but to keep yourself busy and a job where there are people to talk with to keep your mind off your sitch.
Has h ever said he doesn't feel you contribute to the marriage? He might feel resentment that he pays for everything. I think this is a common problem with stay at home moms. You did say you have some credit card debt. Is that from your h or mainly from you?
Just like everyone else has said the less needy you look the more appealing you will look to your husband. You have to find a way to keep busy and detach or you will go crazy.
Not sure what it is about being married 15 years but it sure seems like someone goes into crisis around that time. For me it was my wife. I'm at eight months from bomb and it is getting better for me. We are together and slowly working out our breakdown of the marriage. I've read a month for every year married and I'm beginning to believe that to be pretty accurate.
Have a safe and fun trip.
Shaky
M 42 W 41 S 10 D 7 M 15 Years T 20 Years Divorce busted