EVERY TIME!! - Father issues, please advise.

Every time I try to reconnect with my dad, he does something that disappoints and hurts me. My baby half brother was born yesterday morning (the day after S's first birthday) and I haven't received a call about it from him. The only reason why I even know is because he ditched a divorce court (Gee, I wonder why it's not working out with them...) date with my mom because the baby had been born an hour before the hearing and SHE of all people told me. I was expecting to get a call about it from him or at least my sister. He and his new family came to S's birthday party last week, so it's not like it was when S was born. We just plain were not on speaking terms then. (Although, i'm fairly certain my mom called him anyway. Decent thing, that was.) Since she was a few months old I've been on friendly terms with him. By no means are we close, more like an uncle.
So I'm hurt he's leaving me out of this. I actually ASKED him to call me when the baby came. I asked his GF, too. I know it's a busy time when a baby is born, but to forget your own daughter?
My sister and I are fairly close and I really expected for her to at least call me.
Well, I'm not going to visit them on Thanksgiving.
I want to confront him. If he ever calls, I'll be all "Wow that long ago? Did you forget to call me? Dad, that really, really hurt me. I felt really left out and unimportant to you. I don't know if you take our relationship seriously anymore. I feel really disrespected."

He has hurt me in so many ways in the past. At one point I had denounced him forever, vowing never to let him hurt me again. After extensive therapy I was able to be cordial and even comfortable with him. We have the occational family dinner. I bring mine to his or he brings his to mine. I can't believe I thought "Even he can't mess this up!"
Well, he did.
And it has just crushed me.