Q: how to maintain my 160 weight as it is

A: Maintaining existing weight is usually very simple -- just keep eating the same way you've been eating before! If your old diet maintained it before, then it'll continue maintaining it in the future as well. If you increase your physical activity, increase how much you eat a little too to compensate for extra calories burned. But for the most part, just keep on eating and doing what you have in the past and everything will stay the same.