Threesome is dangerous for a not-so-steady relationship

I know that threesome is dangerous for a not-so-steady relationship, but I still want to try it with my girlfriend. My girlfriend also wanted to try a threesome hookup. So we agreed that we would find a swinger single on a tinder for threesome app. When we found her and invite her over for dinner. Things got out of control. My girlfriend couldn't stand watching me with her. So we stopped and asked the third to leave and we had a big fight over it. We broke up now.