person A: I know it's very petty of me but it is starting to bug me. My family has been very generous towards my adult sister as of late but have not really paid much attention to me.
person B: Have you tried talking to them about this? 
person A: This has happened on and off for years_comma_ and I always try to talk to them. I usually get no response. It's led me to be self-sufficient fortunately.
person B: That's really frustrating_comma_ they'll realize only when you start distancing yourself from them
person A: I have in the past and it didn't seem to work. I'm hopeful they will open up to me one day though.