Um so I have a serious question

So I'm pregnant (whoooo 31 weeks today!) And right from the get go the father of my child freaked out and was like get an abortion we can't do this, we barely know each other, don't live close to each other and my ex will hate me because we already have a 7 year old together. i soon found out that the baby has a really bad heart condition that isnt operable and that the baby would probably die before i reached 20 weeks. So after maybe a month of bickering back and forth with him and after he treated Me like crap and accused me of lying to him and said I'm just trying to ruin his life with this, I changed my number, blocked him on everything, changed made a new Instagram account and called it a day. I wasn't killing my baby because he was scared or because it had a heart condition. please. God is an amazing God. Look at me now (i am 31 weeks and baby is defying the odds) So fast forward a few months lol clearly he did some investigating and creeping and such. Popped up on my Instagram using a mutual friends account. He was super apologetic (by the way this was three days ago) sorry for the situation, wishes things were different, misses the pregnant and baby stage, is sorry how he treated Me, wants us to be friends, said he was selfish and was only thinking about himself, wants to reconnect with me. He wanted to know genuinely how I'm doing. He saw a belly pic and said I look beautiful. I don't know. I told him I forgive him and that I'm not mad at him. Because I'm not. I was spiteful at the beginning for sure. But I was like I can't control his response. it is what it is. And I don't hate him. But I wasn't planning on having him involved at all once we parted ways. So now im thinking should I invite him to be there when the baby is born?? Should I invite him to the baby shower that is next week and ironically on his birthday? Should I even wish him a happy birthday? I'd love for my baby to know their daddy. I mean technically our baby has never heard his voice, or even felt him (like he's never touched my belly) I don't know. All of a sudden I'm debating with myself. I think being a father starts when mama is pregnant. And how he treats you during those months is super important. But he hasn't been there for any of it. All of my appointments, all of my decisions and discussions, all of the stress and tears and uncertainty was shared with my mom and dad who stuck by me and no matter what one of them is always at my appointments. Is it too late for him? I don't even know how serious he is about all of this. What are your thoughts?