How to deal with this jealousy?

My boyfriend has a female customer. She lives on the other end of the country, so no chance they'd ever meet. They talk movies during work (which is fair, no problem with this as he has to connect and build rapport) My issue is her texting him after hours/weekends. I don't think it's often or even long conversations. But to me she is overstepping boundaries and he feels he has to respond because he is milking her for more sales. He is very driven which I love about him and it benefits our future.

I know she will not be his customer forever, he said she is looking for another job. I can't bring myself to be ok with this. I couldn't be mean spirited about her if I tried, it's not who I am. I feel like I just have to be ok with being uncomfortable because its his job. I don't know what to do.

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11 mo
Edit: I have spoken to him about this before. He is sorry that I am uncomfortable and he has given me reassurance to make me feel better. I don't want to keep bringing up the same thing over and over so I feel like I need to just handle it on my own
How to deal with this jealousy?
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