Now i should clarify that the family member in question is 7 months old called Jordan.

I recently turned 19 and I've never wanted a large birthday party or anything so i decided that i'd like for my family to go for a Sunday lunch meal in a local pub near where I live. I'd invited my brother and his fiance, my sister and her boyfriend as well as my mother. However my brother was unable to attend due to work and my sisters boyfriend wasn't able to either due to money issues (Important later). So in total its me (m), my mother, my sister and my brothers fiance whom brought my nephew of 7 months.

Once arriving at the pub it was quite clear what my mother and sister had on their mind as since being asked what i wanted to drink hadn't been spoken to since, they wanted to see my nephew Jordan. Fast forward to being seated. Everyone has arrived and sat at the table and soon im noticing a triangle of conversation with me firmly on the outside, from everything from the baby is cute (to which i agree but which arent?), to the baby had plenty of sleep last night or maybe lack of. I should clarify that my sister and mother see this baby often 2 times a week sometime even more. I spent a majority of my time eating my food largely in silence and when conversation would turn to something other than baby related i was able to join in but it would soon be turned back towards the baby and i would be put out once again. 

After eating food and leaving i was already feeling a bad sad (somewhat aware that im feeling sorry for myself) we head back to my brothers house and more of the same. I would also like to add that i was given a birthday card on my way out which sort of felt like an after thought.

So am i being an asshole for being mad at my family and should i confront them? Or should i stop being an entitled dick?