1) To get your ex back, you need to give them space and not smother them with calls, texts, emails or love letters as this will only push them further away.
2) You should show your ex and others that you can survive without them by staying strong and keeping any crying private.
3) Use this time to rediscover yourself by spending time with friends, pursuing hobbies, and remembering what originally attracted your ex to you. With time and space, your ex may come to miss the relationship and want to reconnect.