Can I leave My Wife without filing for separation?

I can not currently afford to divorce or legally separate from my wife. the situation is unbearable. i have been dealing with her addiction problem for the last three years. she does not provide any income, and is constantly stealing money from me and i just want to move out when our lease is up in october or sooner. we have no kids no assets no property. the only thing we share a name on is our apt lease which is up in October. can i pack my stuff and move out without being penalized for leaving?