I think my best friend been sleeping w/ my baby father

For the past year I’ve had that “feeling” my best friends been sleeping with my baby father 😩 The following things occurred this past year that has made me question this......

1.) MY BEST FRIEND RAN INTO MY BABY FATHER AT THE GYM AND HE TOLD ME BUT SHE NEVER MENTIONED IT

2.) SHE STARTED CALLING ME ASKING QUESTIONS ABOUT MY CURRENT RELATIONSHIP AND SOMEHOW HE FINDS OUT EVERYTHING I TELL HER

3.) SHE STARTS CALLING ME TO TALK ABOUT ONLY HIM AS IN MY BABY FATHER

4.) THEY BOTH GET NEW CELL PHONES & NEW PHONE NUMBERS ON THE SAME DAY WITH THE SAME CARRIER.

5.) I CONFRONTED MY BABY FATHER ABOUT THEM POSSIBLY SLEEPING TOGETHER AND HE DENIES IT. I DON’T HEAR FROM MY GIRLFRIEND FOR ABOUT TWO WEEKS

6.) I SAY SOMETHING TO HIM ABOUT HOW ITS VERY STRANGE I MENTIONED THAT TO HIM AND MY FRIEND STOPS TALKING TO ME ( MIND YOU WE TALK EVERYDAY)

7.) SHE MAGICALLY CALLS ME TWENTY MINUTES AFTER I GET OFF THE PHONE WITH HIM AFTER 🤔🤔🤔🙄

8.) MY BEST FRIEND BUYS A NEW CAR AND WELP SHE TELLS ME IN DETAIL-HOW SHE WENT ABOUT IT. FROM TAKING A $10,000 lOAN FROM THE BANK SO IT CAN BE CHEAPER

9. MY BABY FATHER CALLS AND TELLS ME I SHOULD BUY A NEW CAR & JUST TAKE A $10,000 LOAN FROM MY BANK BECAUSE IT WOULD BE CHEAPER (the same thING she just told me)🤣🤣🤣🤣

10.) I MAKE A POST ON FACEBOOK ABOUT GIRL CODE AND HOW ITS DISLOYAL YOU NEVER DO THAT “ SLEEP WITH A FRIENDS EX, BABY FATHER, Husband exc.... she comments under it LMAO AND WELP SHE HAS NOT TALKED TO ME SINCE🤷🏻‍♀️🤷🏻‍♀️🤷🏻‍♀️🤷🏻‍♀️

I never asked her about it only him and I want answers. 😩 What do I do

Update

I still have no answers 😩 and she still hasn’t even reached out to me. I literally deleted her off of all my social media accounts just to see if she even says anything 🤷🏻‍♀️ It’s very clear I’ve answered my own question though she’s definitely been sleeping with him!!! I feel bad for the people that see nothing wrong with this 🤦🏻‍♀️ She was literally my friend since the 6th grade! Over 20 years of friendship GONE. To top that she is in a relationship with someone and she knew how much I LOVED HIM!!! Only reason I moved on was because he said he didn’t want a relationship.... To think 🤔 she been running back and forth for a full year telling him everything I told her as my friend.... I’m heartbroken 😔