I started therapy once a week around May of 2018 because my mental health had been negatively effecting my relationship, job, and overall well being. It was immensely helpful and it helped me get medicated and start becoming more normal and not a wreck all the time. Fast forward to now, I had therapy tomorrow but my boyfriends parents are coming over a couple hours to celebrate his birthday early. I thought it would be okay to cancel this appointment to spend time with them and clean before they are over. However, my boyfriend got mad at me when I told him. He said “we’ve talked about this” (referring to when I hadn’t been medicated yet and would cancel appointments just because) and when I responded that I’ve been doing better and I have tools to help me here for the time being, he just said sorry and that he understood why but he definitely looked extremely disappointed in me. One session isn’t going to break me, especially since one particular incident that made something in my head click into place and made things easier to accept and move on. I’ve got all the tools available that I learned in therapy and handouts that were given to me so if I have a hard time I can read through them to help me calm down. 
Idk...
I just wanna know, am I the asshole for cancelling my therapy appointment?