Why Am I Mad?

I'm usually a pretty laid back person.  I don't let things get to me and I don't hold grudges.  I just keep it pushing and let karma deal with others.  Don't get me wrong, I do get frustrated from time to time especially since I work in fast food and retail.  My jobs aren't the source of my frustration right now though.  I had a conversation with a close friend of mine last night.  She and I are super close and hang out frequently.  Yesterday she decided to do something nice for her boyfriend for his birthday.  She planned to take him out to eat.  The restaurant they chose was packed so they ended up getting a hotel room.  Still not too sure why they couldn't find another place to eat.  Anyway all he wanted to do was fuck.  She has not crossed that line with him yet so the situation was uncomfortable.  He started to play rough and she had to make him stop.  He fell asleep so she texted me to meet her.  She told me about what happened.  She told me she needed to see me because she wanted to feel safe.  I was fairly quiet during the conversation last night but it's been on my mind ever since.  So now I'm asking myself - Am I mad because she went to a hotel with this dude or am I mad because of the fact that he scared her?  I don't know but I wish I could figure it out so I can move on.