Tombo,
Is there any reason why you're therapy sessions would be reported to your family or co-workers? Are you involved in security-sensitive work that demands absolute constant scrutiny of employees?
If you don't deal with your addiction, it's going to get the best of you. You could go to therapy and weekend-rehab, or you could be arrested and charged with drug possession; it's just a matter of time. Please consider getting help -- nobody hides their addictions for long. Especially if they're illegal in nature.
As to your bicuriosity -- don't worry about it. Some people are more bicurious than others, but it's overall, perfectly normal to find some 'abnormal' things erotic. Just pick up any book of erotica. You don't have to "come out" as a bisexual. Ever. But you do need to be comfortable with yourself.
Go to therapy. It helps (supposedly

)