help!

I need help... so my boyfriend off but mostly on of 7 years has a best girl friend. I've been with him since I was 13 and he became pretty good friends with her around that time as well. Since then they have been best friends and are very close. She used to like him and it would bug me that he still was so close to her. I KNOW he would never do anything with her or even like her (trust me she's not his type) but as of recently (she hasn't liked him romantically for a long time) it STILL bugs me that they're so close and she'll take him places and pay too. 
Is it right of me to tell him to not be friends with her or do I need to get over this and just keep thinking how nothing would ever happen? 
Maybe I just feel like she is more special in a way??