person A: I am a very naive person_comma_ so I was completely shattered when my boyfriend came home and told me he was moving in with another woman.
person B: How long have you been with your boyfriend?
person A: 5 years! We lived together for four years. 
person B: That's a long time_comma_ so sorry to hear about your troubles.
person A: Yes_comma_ it was really hard. I really trusted him_comma_ so I missed all the red flags. 