Richard: Are you pissed?
Rachel: Why would I be?
Richard: Dunno
Richard: You're so cold with me these days
Rachel: What are you talking about?
Richard: Maybe it's me...
Richard: But I have a feeling that something has changed between us
Richard: You used to text me much more
Richard: Now you barely have time to reply
Rachel: I'm busy, that's why...
Richard: You are always busy
Richard: Even when you had double shifts at the hospital you always had time to send me a little message
Richard: What happened?
Richard: You don't want me anymore
Richard: If you don't, it's okay. Just tell me. No need to pretend. 
Richard believes Rachel does not want him any more.