I really feel like Sakura was condition to love Momoko. Or she condition herself after feeling guilty about what she did.
No one consider taking her feeling seriously and just interpret what they wanted to see and hear.
Momoko who wouldn't break up because she developed feeling for her along side their trial dating while knowing that Sakura wasn't particularly invest and was looking for a way to end it.
Sugi who push her towards Momoko without acknowledging her feelings. It's not because you don't hate someone that you love them enough to date them.
This is messed up.