I want to create a new form to edit surveys (I have thought about two lists surveys and questions, a survey can have many questions) and I want it to be editable so user can add or delete questions to a survey, how can I achiveve this with infopaht 2013 or sharepoint designer 2013 or any other way?
I would follow a different approach. Firstly I would agree with other relevant groups about the format of the survey and than upload it. You can create a new document (it can be word, excel, access etc ) and allow every user to edit the document at the same time. You can use versions to leave out updates that you don't find useful. If at the end everyone agrees with the content and structure of survey, you can use the survey app provided in Sharepoint 2013.