My partner also drinks and uses drugs, is that going to be a problem for me?

If an individual is determined to get help for their addiction, I believe nothing can stop them. At the same time, they may have to make difficult choices. Recovery is something only you can do for yourself, but you cannot do it alone. Some people have partners who are social drinkers/users, if they are supportive of your recovery then it should not be a problem. However if they are also addicts it will be very difficult if not impossible to stay clean and sober in an environment where there is drugs and alcohol.