Crying is a very powerful form of emotional release and is something that you should not be afraid to do. Some people will prefer to cry in their own privacy where they cannot be seen by others while many will release their grief in the comfort of family and friends.
However you do it, crying is something that you should not be ashamed to do. It is very important to release your intense emotions through crying as bottling your emotions can make recovery from grief a very slow and much more difficult process.