<human>: I'm a 2nd year student in college, and I met this really pretty ginger girl. We've been getting really close, and I like her, and she seems to like me. We are always in my room with me either playing Portal or watching movies. I'd make a move, but she has a boyfriend. I don't have a problem with this guy, and I've never met him, but he sounds like a cool guy. The other night, we were watching a movie and I started to scratch her head, and she was saying how good it felt, and how she wanted me to do the same to her back. I was hesitant at first, but I did end up giving her a very long back rub which ended with us cuddling while watching the movie. I wouldn't normally feel bad about doing that, but I really like her, and I want to make a move even knowing she has a boyfriend, and this is the second time I've done something like that (my now ex cheated with her then boyfriend with me). So, Reddit, I feel like a home-wrecker and a bad person even though I think I'm a good guy (I really am a nice guy who isn't an asshole to everyone)... Am I a bad person?

Could you distill the essence of the text into 1-3 sentences?
<bot>: I want to pursue a girl I like that has a boyfriend who doesn't seem like a "Scumbag Steve" and I don't know if it makes me a bad person or not.