What ended your relationship with your best friend?

Fast-forward to 8 months

And she just replaced me with a new friend and I spent all my last school days crying and hating my own character 😞

…… Never hate urself for some unwanted people and trust them with ur secret 💕

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So first X became to close with me and even called me with nicknames and approached me saying he had a huge crush on me

X spoke me too friendly and the same day I got to know that Sara and X are in relationship for almost 1 year and x trying to get me all this time

Things became worse when my other classmate (let's call him x) came between us

Is there a type of function where every point has exactly one tangent line passing through it? If yes, what is this type of function called?

(I was the last person to know about their relationship that to at the end of 12th)

Everything was nice until our 10 result and I got more than her so she started to distance herself from me and d got some new friends

But I politely rejected me and stayed as a friend

Is there a reason why many men give up on dating and relationships? Is the dating scene difficult for them?

When I told my friend about this she just ignored me by saying I am soo jealous of her

My tenth percentage ended my 8 years friendship

Well me and my friend let's call her Sara (name changed) were the only girls in the whole class of 10 students so obviously we both are close with each other but because of my little cold character and straight forward talks we always had some small fights

I've tried to write a Kindle eBook and have published it on Amazon. But the thing is that I haven't made any sales yet even though I published it nearly 6 months ago. How do I get people to purchase it?