How can I make him obsessed?

So I’ve been dating this boy on and off for 3 months now and in the beginning he was really serious about me and very loving, he even told his mom but as time passed by he suddenly changed and started being more and more cold. He managed to tell me that he doesn’t want something serious but wants and ador spending time with, he said that his heart is broken right now and can t love. What can I do to make him crazy over me?

How can I make him obsessed?
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