First ask yourself why you feel the need to convince them.
Then ask yourself why they feel the need to believe in God.
Then accept that convincing them is not actually going to make either of your lives better.
If at some point they stop needing to believe in God, they will. If at some point you start needing to believe in God, you will.
There's a story about a soldier who said that when people are about to die, their beliefs switch.
When his military unit went into combat, in a situation in which they thought they were going to die, the religious ones yelled, “There's no good!” while the atheists bowed their heads and start praying.
Our beliefs are necessary for us to live our lives, until they aren’t.
Dave Wolovsky, MS CAPP
Relationships Coach, answering the internet's questions about all kinds of relationships.