<human>: Can you provide a brief overview of the text?

Me and gf have been dating for about 2 years. 
Recently, I was about to trade my car for a better car. The person who wanted to trade cars told me to meet up with him around 2:30ish because that was the only time he could see me. I would usually go with my stepdad but he had to work until 5ish. So I decided to call an old friend who knows a lot about cars and see if he could help me. My girlfriend doesn't like my old friend because he's a douche who smokes, drinks, and cheats on girls. So my girlfriend thinks he's a bad influence. And she doesn't trust me around him. Better yet, she doesn't trust me at all because she's the type of girl that thinks that "all guys are the same" i have never cheated on her, i have never gotten drunk behind her back. She never believes me. Anyways, I had to go with him because I had no choice. And now she's throwing a bitch fit about the whole thing and she says we need a break because I've been annoying her lately. 
I don't really know what to do.
<bot>: Gf got mad because I hung out with a bad influence(because I had no choice) And even though I didn't do anything she wants to take a break. Help.