Addicts are people to. That's a motto of mine. There are a small percentage of addicts who actually do keep clean-not to say they don't have an occasional relapse, but they are putting effort into it and making recovery the priority in their life.
Now, your drinking isn't going to have a positive effect on this relationship. If you're serious about not drinking, one of the first things you will be told (by a professional) is to wait AT LEAST A YEAR before starting a new 'romantic' relationship. This sounds silly, but is actually very important. It's really so you can concentrate on you and work your way into a lifestyle that you will benefit from for the rest of your life. You can't do this effectively if your having relationship problems, if your partner starts using again, etc. Getting help together? That really depends. Some professionals would say yes, but once again, that wouldn't help the whole staying out of a relationship for a year thing, you know? You are only 21 and have a whole life ahead of you. Remember, with this guy, you'll ALWAYS be worried that he'll relapse and if he does, you then have harder decisions to make. You really may be setting yourself for more than you should have to handle at this point. Take it slow-be friends. Get your own self together and learn how great life can be for you before you go tying yourself down, especially to a potentially dangerous relationship.
Only you can decide for yourself, but I learned the hard way-my son's father is a cocaine addict and alcoholic. I'm not, but living with him proved to be more than I could handle. You need to remember that it takes so much effort for you to keep clean & having to be concerned with someone else's sobriety at this same time will not help you.
Please think about it.