How do I get my boyfriend to stop criticizing me?

I love my boyfriend very much and he loves me. He's grown up in a household where his parents are very critical of everything he does and says, so he has picked up a little bit of it. The things he criticizes me for aren't really a HUGE deal but they are still things that effect me such as how I am so laid back and he's a perfectionist. When I bring up how much it hurts me I know he cares because sometimes he breaks down crying saying he's sorry and he doesn't want to lose me. I guess I'm just wondering if this is somewhat normal and if there are other people out there that are going through the same thing.
How do I get my boyfriend to stop criticizing me?
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