I can completely understand why would feel hurt. There have been times when I've texted my T outside of session and she hasn't responded and I've felt hurt, too. That said, I don't think it is realistic to expect her to text you back on a Sunday. Even if she has done so in the past, weekends are expected to be time away from work and with family/friends. The agreement you have with her is also that you're allowed to text-- and sometimes she will respond and sometimes she won't. She didn't break an agreement; she just didn't respond the way you wanted her to. I think wanting that response from her is totally understandable and human-- but I also think it's understandable that she didn't respond. She didn't do anything "wrong" either. No one did. She just decided not to respond to your text at that time. I really hope that you will go to your session and talk this through with her. When my T has hurt by feelings by being unavailable, it's really sucked-- but I've hung in there and talked it through with her. I always feel better afterwards. I hope that you can talk this through with her and come out feeling better also.