Am I a ********?

I'm a decently popular guy in high school. This takes place about 3-4 weeks ago. My girlfriend was beautiful, popular, funny, and the most impressive of all, she put up with my jokes. I was out on a date with her, we were seeing a movie and going to dinner. After dinner, I was hanging out at her house and I got a text from a girl I've been friends with since we came out of the womb. She told be that she needed help, and I knew that she was going through bad depression problems, so I left and drove over there. My girlfriend got mad at me for leaving in the middle of something, and I promised I'd be back after. When I got to my friend's house, I don't even remember what she needed, but it was nothing important. I checked my phone after I helped her, and my girlfriend was getting increasingly mad at how I continuously put friends in front of her, which I admittedly do, and told her that it was because no girlfriend could mean as much to me as a friend (in a much more blunt and poorly worded way.) She didnt respond, but I didn't notice because I was already heading back. When I got to her house, I walked in and went to to her room and saw her with a gun in her hands. I freaked out and ended up talking to her for about 6 hours. She's fine mentally and has a more accommodating boyfriend now, but I can't stop thinking about how I nearly caused a death. Am I a dick?