Sex is definitely a very important aspect to a relationship! Giving it up entirely will definitely lead to a whole new set of problems because you need this intimate connection to feel loved and satisfied in a romantic relationship. Although I'm not quite understanding, you are interested in bondage type things while she is not? And she also does not like to do oral sex... and these things led to you both agreeing to cutting out sex completely? I think you both should find a happy medium. I think you need to talk more about it with her. Make sure she knows you are unhappy about the situation and it's causing you stress.