After hanging out with the group a few times, I started to notice that my boyfriend tends to touch one of those girls more often than I'd like. He would playfully rub her stomach, her knee, her shoulder, her head, etc. This looked like it was all in the context of playfulness as it was in front of everyone.
However, I can't help but feel a little paranoid that he may be attracted to her. I've heard from somewhere that guys like to touch and/or be physically close to girls that they are attracted to. I haven't seen him act like this with other female friends, so why her?
Am I reasonable with my fears or am I just thinking "too much?"