the bad ending only occurs on the Love/Love route at the moment
but who knows if there arent more bad endings to come on later updates
there are 4 more days planned afaik.
you are missing out on the best part of the AVN imho if your successful on the Love/Love path
what you need to do to be successful listed below
Need to have 70 Love points for both before the friend catches you in the Morning
Speak to Cassie in the Lingerie store instead of Eve
then, the following day, either while at Cassie's place or at night, you have to tell Eve that you can choose none.
first option is at Cassie's place
"This morning was very difficult to handle."
The second option is at night, in Eve's bedroom
"I don’t accept it."
You need just one of those two.
That same night, while with Cassie, talk with her instead of kissing her
then on the morning, while in her room you have to tell her : "I will tell you everything / I would choose no-one / Apologize