What kind of mentality will my derailed predecessor contact me?

Your predecessor should be in a state of long duration, and life, work, clothes, love and love will be boring. If it lasts for a long time, he will feel bored, want to seek change, and then he will feel bored. Besides, two people have been separated for a long time. Maybe your ex can only think of you now, so he will come back to tease you, but you'd better be careful.