Ok I'm a senior and I've been dating a sophomore for three weeks. But my girlfriends sister (Who in the same grade as me)tries to make moves on me when my girlfriends not around. Like she keeps touching me on the arms, and sometimes she'll make me rub her chest and tell me she loves me more then her sister. What does that mean?

She's coming onto you dude, and you need to put a stop to it if you are serious about your girlfriend. That's not okay and you need to tell her sister so, but also tell your girlfriend that her sister makes you uncomfortable.

Are you kidding me? You don't know what this means? It means you need to tell you girlfriend that her sister is trying to take you away from her.

Careful though, depending on how close they are, you could lose your girlfriend. Welcome to teenage relationships.

Obviously she wants you bad enough to put the moves on you.You should tell her to stop before she progresses into thinking you are into her.If your serious about your girlfriend you should tell her straight away.

P.S: what is a soft more I'm from AUS so I don't understand?