You can totally live without sex, I am definitely a testament to that. This time round, I am about 1 year at no type of sexual contact with another. I think it really depends on what you want. I mean I occasionally get cravings but seeing as how I am not the type of person to crave intimacy, actually I strongly fear it in general, I tend to get over these cravings really fast. I think the big thing you have to define for yourself, is determine what sex is, what it means to you, and what it does for you. That will truly answer your question on whether you can live without it. It will not kill you to not have sex, there are multitudes of celibate people around the world.