So I have a new relationship that has been going on for about 4 or 5 months now, I like the guy a lot very genuine, respectful and attentive. He's actually said that he loves me (early I know), and that he doesnt want anyone but me. My only problem is he has this girl that he so called calls his "sis". My problem is they are super extra around each other posting pictures of one another with sis and bro comments. They haven't even known each other for that long to even have that brother and sister bond. And they are always around one another every time I turn around that it has started making me very uncomfortable. They'll talk on the phone, text, FaceTime. He'll even go hangout with her and her girlfriend. Now I have tried talking to him about how it makes me feel, and he always says that's his sis and that she's gay so I have nothing to worry about. But to me a female is a female. Not to mention we all work at the same place so when he isn't at work she's telling him my every move and it's annoying. Here's where it gets alittle funny, I had a good friend at the work place where we'd go on break together and he'd come to my work section and have conversations with me. Well the guy I'm dating now didn't like it and went upon himself and talked to my friend. I don't know what he told him but that guy is no longer my friend and has been keeping his distance. And i thought about talking to his "sis" since he talked to my friend but, I don't want to come off the wrong way or cause tension. So my question is how should I feel about this?