Is it justified for me to be upset that my boyfriend asked me for a paternity test if we ever have our first child?

I've been with my boyfriend for 4 years, and I'm certain I want to marry and have kids with him. We talk about all that a lot, and during one of those conversations, he brought up the manipulation a lot of men go through at the hands of their wives who trick them to raise an affair child. I wasn't expecting it, but then he asked me that if we have our first child could he get a paternity test or not. I was crushed because he still doesn't trust me after 4 years and probably still has past fears from his horrible former girlfriend. I've never ever cheated on him and never will in the future. I thought after 4 years he would believe that but I think I was wrong. Am I wrong for being upset?

Is it justified for me to be upset that my boyfriend asked me for a paternity test if we ever have our first child?
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