My boyfriend's mother told me that she couldn't meet anyone before the age of 26, otherwise it would affect her life span. He cried when he knew we were still together, so ... we broke up. ...

There is only one mother and many lovers.

Since this is the case, why not choose to trust him? Didn't you say it yourself? The only choice.

It's like asking him who he would save if you and his mother fell into the water at the same time.

He gave you a promise. Something is better than nothing. We can only choose trust.

Besides, what if the calculation is true? That's it. That's it. If it's true, you'll be even sadder.

May you be happy.