The female main character is just unlikeable, she doesn't act like a 34 year old women. She knows everything better and only her opinions are the right ones. 
Girl, have a little sympathy, especially for your sister.

Her "friend" Louis is described as cliche gay man, who likes to cause drama and is only interested in himself. Then at least SHOW the things you are accusing him to do and don't TELL us about it. 

She meets the main love interest at page 124 (German edition). At this point I didn't care about any of the characters or her life. But I kept reading ...

I stopped the moment she concludes that the MMC must be gay, because he went to theater group in school, doesn't want to talk about his love life and would look on a gay magazine cover?!?!?! Wtf