I really don't know what to do

Tia
I am 19 my I just met my biological father a year ago literally... He's never met my brother who is now 18 and I've been trying to have a relationship with him n been trying to get him to let me meet the rest of my family . I met two brothers and there's 9 of us including me and the brother I grew up with ... My dad says he care but it don't seem like it. I've told him how I felt and he ignores me most of the time , it's hard for me to just give up even though it's been a year now and still no change , I stayed crying over the situation because I'm really hurt deep down inside .. I don't know what to do I don't want to quit trying because I want to know my family but I keep getting my feelings hurt ... It's really hard to just give up on blood... 😢