Baby blues?

I'm 12 days post partum and this is my 2nd child. I'm exclusively breast feeding and lately I've been feeling...lonely, I guess? All I do is have my daughter latched to my breasts, it feels like. I feel like I'm not able to enjoy my family visiting (my dad and step mom are visiting from out of state), and it feels like there is a wall between me and them because all I am is a milk machine. 
Please don't bash on me. 
I understand that newborns just eat and sleep and so for now all I am is a milk machine, but sometimes I just want to cry. 
I just want to know if this is a normal feeling thing...