Sorry for what brings you here.
Six months is early in dating. This is the time in a relationship where one determines compatibility, decides if the other person shares the same interests, values, morals. And if not, it is called off. Normal part of dating. Not sure what factors determine incompatibility for you but ask yourself, why isn't drug addiction one of them?
There are a number of women on this forum who, early in the relationship with their A, came here and asked how they can help, what they can do. Years later, many are still here. Years captive to a loved one's drug addiction. It is heartbreaking.
I hope you escape that fate.