Well my girlfriend and I have been dating for 2 years now, and her sister that's my age has always been friendly with me. 

Some people may see this as just friendly chit chat and stuff, but I feel like she is trying to get close to me but not in a friendly way.

I should say this now that my girlfriends sister hasn't had a boyfriend before, so I'm thinking that it could be that she's jealous that her sister got a boyfriend and she's still single. But maybe I'm just thinking too much about this.

I'm not looking to cheat on my girlfriend. I have no intentions on hooking up with her sister. If I need to talk to her sister about this, how could I approach this without hurting her too much or harming our friendship or my current relationship?

Thank you, and feel free to discuss as much as you want.
user
Girlfriend's sister has always been friendly with me, I feel like she's trying to get close to me, how could I approach
assistant
Well my girlfriend and I have been dating for 2 years now, and her sister that's my age has always been friendly with me. 

Some people may see this as just friendly chit chat and stuff, but I feel like she is trying to get close to me but not in a friendly way.

I should say this now that my girlfriends sister hasn't had a boyfriend before, so I'm thinking that it could be that she's jealous that her sister got a boyfriend and she's still single. But maybe I'm just thinking too much about this.

I'm not looking to cheat on my girlfriend. I have no intentions on hooking up with her sister. If I need to talk to her sister about this, how could I approach this without hurting her too much or harming our friendship or my current relationship?

Thank you, and feel free to discuss as much as you want.
user
My girlfriends sister has always been friendly with me, but is sending mixed signals to me and I'm not sure how to
assistant