AITAH For Expecting My Partner’s “Sister” To At Least Congratulate Me On My Pregnancy

I have been with my partner for a year now and we are expecting a baby girl. He has a friend (lets call her Emma) that he grew up with that he sees as a sister, I was iffy at first but their relationship is extremely platonic. Anyways my partner sees her as family so I tried to built a relationship with her by doing things like

1. checking up on her whether thats in person, on call or text
2. offering to buy her food anytime I was with her and I was hungry
3. I was there when she needed emotional support But what did I receive back? nothing she never checked on me, never offered anything. Anytime she would message or call me it would always be about my partner if I was with him or if I could pass on a message. When I got pregnant I expected at least a congratulations or a “hows pregnancy going” but no nothing like that.

Would it be extreme if I decide not to want her around me and my child at all? I have already brought this up to my partner he sees my point of view but do you think it would cause issues between them?