Your question was: Does Mystery's method work on match.com?.
Take deep breaths. It's really good that you see that it's your insecurities and not him. The situation triggers childhood issues of abandonment, loss, not feeling loved enough. Therapy might be a good idea. And keeping busy, have your own life. Be a busy, excited about your life woman who doesn't have time to sit around worrying about every unanswered text!.