Should I be worried about his work wife/best friend?

Okay so a little background, my boyfriend and I have been dating for a little over a year, we have pretty much the perfect relationship and I am beyond happy…his female coworker/best friend is 14 years older then him and they have known each other for 7 years.
At first judging from the age gap I wasn’t very concerned, but I noticed quickly after we started dating that he talks about her A LOT. Now, I know his occupation is incredibly stressful causing him to rely on his coworkers more, but he rarely talks about any of his other peers besides her.
I’ve met her a few times and she is lovely! Always very nice to me, I really to enjoy her company. I just feel like she always comes up in conversation and he never ever says anything even mildy negative about her, he has talked bad about some of her exes, which bothered me a little bit, but he has done that for some of his other friends too. My problem here is I’m not sure if it’s my gut or my anxiety! They don’t talk too much outside of work but he does seem to update her about things over text a decent amount. I just can’t explain it, the way he talks about her makes me uneasy!

The reason I think it could be my anxiety is be because I did (in the past) have a male friend that I was very close to and developed feelings for overtime…I guess that’s why I get nervous, she’s pretty, funny, smart, they get along great! Why wouldn’t he like her?

any advise or opinions will be great! I’m eating myself alive

Should I be worried about his work wife/best friend?
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