Starting with your summary, to me personally as I can't speak for everyone else on Inkitt, it was very dull and lack interest for me. It didn't get me motivated to read the novel at all and if you add a little spice to it I feel like you can bring this story together. Sure a short story about friends is nice and all but it's not an attention grabber and it doesn’t keep readers interested. You need to add drama or some sort of plot that works against what the main characters are trying to establish. You need a protagonist and an antagonist to help move the novel along and you lack both of these things. Work on making a constructive plot, maybe they are trying to find out who killed a friend at the school, maybe they all secretly hate one another but have to stay together to keep a secret, these are just some examples you can use for the future who knows. Aside from that, you need to develop some type of plot.
Read the story now
Furthermore you cant add emojis in place of descriptive details. You're supposed to be able to write about facial expressions rather than using a text symbol for them. The more detailed you can write, the better your characters. The audience needs to be able to see and feel your characters, the characters you made in this story don't even seem like people to me. I can’t imagine what they look like, I can’t get any idea of how they might act, dress, conversate, nothing. Make them into people
Lastly, your rushing every scene and have poor formating for each part. Your writing is all over the place and is very odd. You don't have a writing style as I feel like your writing the first thing that comes out of your head without thinking about how it looks on paper not to also mention your grammar isn't the best either.
Work on your skills as a writer and develop your stories better is all the advice I can give to you. I am not here to hurt you as this is just my opinion and my opinion alone. Others might love the way you have written this story, and they could be right while I am completely wrong. Who knows, all I know is that this story wasn’t my cup of tea but it might be someone elses.
Despite my review, work hard and get better.