Is can help always followed by a gerund? Does it mean the same as stop? <br/><br/><br/>- I can't help missing you when we are not together. <br/>- I can't stop missing you when we are not together. <br/><br/>- I can't help it. <br/>- I can't stop it. <br/><br/>- I can't help thinking about my holidays. <br/>- I can't stop thinking about my holidays. <br/><br/>Would all these sentences make sense? In which context should we use them?