Am I in the wrong?

Just looking to get second opinion on this and it’s a long read so I don’t blame people for not reading all of this. I have a friend who i’ve been friends with the last 10-11 years, I would call her my best friend. I always thought she would be the auntie to my kids. Some back story is needed but when I was pregnant she hung out with me maybe 3-4 times. When I had my son she didn’t come see he until he was a month a half. She was just getting over a cold so that was fine but she was 100% better when he was around a week. It took her so long to see my son because her bf didn’t want to come with her and she finally convinced him around a month and a half. They stayed a total of 20 minutes because he wanted to go. Fast forward 17 months to now and she’s seen him a total of maybe 10 times and 4 of those times were her actually making the plans and sticking to them. The rest was his first birthday, and i’m friends with her sister too, so the rest was her sister inviting me to do things and she happened to be there. The last time she even asked how my son was doing was literally the week he was born. She couldn’t answer a basic question about my son. She moved away In january, 5 hours away, and only comes home once a month friday-sunday. I know she had a lot of people to see in that time frame and i’m okay with not seeing her everytime but since she’s moved away she’s never seen my son and hung out with me once without my son. But she’s constantly hanging out with one of her other friends everytime she’s home, her friend is also pregnant so that makes me feel terrible because she couldn’t bother with me when I was pregnant. This is where I start to feel bad for saying anything. Just about 2 months ago she found out she had cancer, a week later she had surgery and had it removed. She never needed treatment or anything other than surgery and she’s now cancer free and fully healed from her surgery. I was feeling like distancing myself from her for a while and was going to say something but I held off because of cancer because I knew she wouldn’t have anybody. Her bf was literally no help but that’s a story for another time. I drove up with to stay with her for a night, there for every phone she made before and after appointments. I was there with her every step of the way over the phone but not physically. Anyways, I finally said something to her 2 weeks about how she can’t even ask how my sons doing and she said “sorry i’ll be better”. She still hasn’t asked how my sons doing yet. She was home this weekend and I messaged her about hanging with or without my son on saturday and my messages/snap sat there until monday. She was posting stories on snap and sent me a generic snap you would send to people with a streak but my messages still sat there unread. She finally opened them monday, didn’t reply and asked me a question about a girl I used to be friends with as she was in an accident. So I treated her messages like she treated mine and left it there until the next day and didn’t reply (i’ll admit that was petty and i’m in the wrong there) and she started messaging me asking if i was okay and why was i mad. I did kinda ignore her for 2 days and that wasn’t right but I was upset and I knew if i replied I would of been bitter about it. The main reason I didn’t reply is because she took the pregnant back home with her for the week to hang out and do some stuff and I was upset because the only way I got an invite was because she had cancer. Now she’s using that as her reason for not making anytime for me and my son. Again, I understand she went through something traumatic, i’m not trying to take anything away from that but to me it feels like she’s using cancer as an excuse for the whole 17 months my son was alive when it was done and over with in the last 2 months.