I think my boyfriend has a crush on his coworker. They text each other. What to do?

Anonymous
They text each other often. I overheard him telling his roommate that she told him about her workouts when she texted him. They are paired up together in their department and the boss calls them her minions. When he and I first started dating he dropped her to the airport for her flight. When I first met my boyfriend, he had a moustache like her boyfriend. The part that bothers me is that they text each other about their day. Her boyfriend is long distance and is in a different timezone. She's a pretty white girl like him. I'm Asian and not as pretty. He liked a couple of her pics on IG. I know he has a thing for white girls because he told me who he finds attractive on TV. I'm mainly hurt about them texting each other. Do I just let it go?
I think my boyfriend has a crush on his coworker. They text each other. What to do?
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