I also used to be (and still am if I'm honest) concerned with what people and our families would think of my situation, his addiction and our relationship. I just have to remind myself to do what is best for me.
If all those people on the outside just knew a fraction of what went on in your/my house, they would be cheering for you. So let them see it - doing so will make you feel less alone and also is one more step to having him fall on his face.