What should I do if I want the man I like so much and he told me he needs time apart?

yes you would, you would sound like your clingy and needy if you contact him, I know that it is hard, respect his wishes and give him the time he needs, but please do carry on with your life, do not sit around and wait for his call, human beings tend to only appreciate someone until the person is gone, hang in there, and trust me he will call you, he will be wondering what are you up to and will also be wondering if you have moved on, he will call you before the end of 1 month, love yourself