Best friend doesn't call me anymore?

Hey my best friend has stopped calling me on the phone ever since I had told her that I have been attending my place of worship. Me and her are both the same age. In our 20s. And I find it weird of she doesn't call me and text me like that. We used to talk on the phone almost everyday. Also which I'm very happy for her. She had told me that she has a new boyfriend. Which she hangout with him everyday. Whenever I ask when she is available to talk on the phone. She is suddenly is very busy. She normally makes time to talk to me on the phone even when she has other friends and family she talks on the phone. I don't expect her to call me daily or talk on the phone every week. But it's about 4 weeks. Almost just the time period I guess she has been dating this person. Me and her both did had a bad experience of going to our place of worship. But I go to a new one that's the same named title but different location. And yeah... I want to get everyone's else personal opinion of possibilities. Because when she was married at point (divorced now) she would always make time for me. And we would talk on the phone all the time. So I don't see what's the exact excuse really?

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And whenever I tell her I love her. She doesn't say it back. She always gets weirded out or uncomfortable with saying I love you. Though she was the first one to say I love you in our friendship. Even though it doesn't matter who says what first. (friendship only not romance) We are both are women. (We have happened to be bisexual) But we are just friends only and we considered each other as best friends.
Best friend doesn't call me anymore?
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