Can I stop and start antebuse whenever I want?

Not recommended. If you are tolerating the medication well you should stay on it as directed. My concern would be you want to stop it so you could drink, if this is the case talk to your doctor or counselor.
If you want to drink. And if you want to drink, don't take antabuse (disulfiram). This drug only works when you take it, and the only way i prescribe it is with an agreement with a family member or close friend to be the Antabuse (disulfiram) "buddy, " where you sign an agreement that you take it in front of that person or your doctor hears about it immediately. Talk to your doctor about Naltrexone or acamprosate which reduce craving+counseling.