Alone/friends have disappeared

At first I thought I was just being sensitive but as the weeks have gone on (I'm 24 weeks right now) it's starting to set in...my friends don't call me anymore. I'm one of the first in our group to be pregnant and at first everyone was all "don't be surprised if I call  you all the time to see how you're doing".....but that never happened. Only my husband, my sister, and my brother who is overseas thinks to ask how I am. I'm just feeling really alone in this and don't even feel comfortable talking about it when I'm with friends because they just don't seem to care in my eyes. I don't even want to talk about being pregnant all the time I just want to feel like my friends still care to even talk to me...it's like they see me as different all of a sudden and it's heartbreaking. I can't shake this disappointment feeling. Anyone else experience something similar?