My boyfriend and I moved in with one of his friends from work. She's super nice and she's becoming a good friend of mine. However, the way that my SO acts toward me is kind of mean...like, he's never loving or adoring like he used to be (when we first started dating) and he talks to me like I'm stupid most of the time. We argue more than anything, now. The way he acts toward her, it's like he'd rather be with her than me. She's more his age (i'm 18, he's 25, and I believe she's 23-24). I'm 7 months pregnant with his baby. I have no idea if I'm just imagining things and my hormones are getting in the way of my better judgement or if this is really happening. Help?