Should I believe my boyfriend or my friend?

I’ve been with my boyfriend for 6 months and previously we just went to a tanning salon where I managed one of the stores. I took him there because my really good friend manages that store and knew she would help him. When me and him went in together her employees didn’t really speak and word and were mute but said he was cute. He went in later for lotion and said that they were flocking with him and were talking down on me about my skin. And working in an industry about skin color really hurt my feelings because I use to be white because I am a red head but have genes where I can tan very easily. They proceeded to say I can’t tan because I’m a ginger and how I’m a skin type 1 which I’m not. He told me they kept saying how pasty I am but when I asked my friend she said the complete opposite of what he was telling me. She swore on the Bible and ever on her kids. I told him this and he said people who lie do that all the time to be more manipulating. I’m not sure who to believe about this conflict because he said that he would never lie to me and swore on everything he loves. Please help
Should I believe my boyfriend or my friend?
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