keep something from someone means not tell or control yourself, refrain (e.g. We kept our relationship from our friends for a year.)
keep from something means to prevent from doing something (e.g. Ann could hardly keep from laughing.)
keep something from someone means not tell or control yourself, refrain (e.g. We kept our relationship from our friends for a year.)
keep from something means to prevent from doing something (e.g. Ann could hardly keep from laughing.)