We’ve been on and off for years why did he do this to me?

It’s been 8 years and 3 kids
He left for good until last January told me I was his soul mate he was so in love. He cried to his friend he loved me so much and it was perfect etc and said we are having the best sex of his life

By April we were fighting. By October fully split.

He did the same thing this January I was his soul mate. He didn’t tell many people we were together

Then April split

He now left me for someone else. Years ago he did the same thing. Expect she didn’t want him and came crawling back to me.

Was I alwuas jsut there to keep until he got someone else?
Alwuas there when doesn’t have someone
It’s just how he is
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We’ve been on and off for years why did he do this to me?
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