Losing friends while pregnant

Well it's officially happened. I've only lived where I lived for 5 years and I moved after high school. I had a girl that was my best friend here. Well after I found out I was pregnant she started treating me different. She wants a baby too. But it's not like I got pregnant on purpose just to piss her off. My husband and I quit trying because we were trying to buy a house. The other night I went to a family members house to play cards and my "best friend" was there with her husband along with one of my husbands other friends and his girlfriend and their baby. As soon as I walk in the door they start whispering "scoot over I don't want this bitch sitting next to me" it sucks. When you've literally done nothing to either of them! It sucks having no one to talk to. I'm graduated high school 5 years ago. I wanna leave the drama in the past! Why do people feel the need to treat you like shit just because you're having a baby?