She finally ignored me?

So I was with this woman for 4 months I'm 22 she is 30 and I finally told her she was my girl. Next day her body language was off. I started applying dating techniques like calling once a week when I used to call everyday day or text. Then I started waiting a few hours to respond to her. These are the things I learned from dating coaches. Did this ruin things for me or was it because she didnt want to get serious with a younger guy??

?2019-02-11T20:17:18Z

Dating techniques ? Treat other the way you want to be treated. She probably thought you an immature arrogant narcissist