My ex is being weird?

what does it mean if your ex calls you all of a sudden saying that he misses you and brings all the memories you had together and still remembers the smallest detail about you? And that he is still waiting for the time that he can see you to give you the gift he bought you two months ago (before you broke up)? He even replies to your whatsapp stories which are talking about the future husband and how should he be like? And last but not least calls you again saying that he just passed by the place that you two used to spend time together at when you were together, and this reminded him of you so he called even though he was with his friends and tells you to call him sometime and not to ignore him? I am so confused because he is giving me mixed signals sometimes he texts me or calls and then completely ignores me.
My ex is being weird?
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