Is it wrong of me?

I got back in touch with one of my friends from X-ray school. She’s a few years older than me at 39. She doesn’t have any children yet. Her and her boyfriend started trying for a baby about six months ago. We started commiserating about being older and trying to conceive. I felt like I had someone who understood and who I could talk to. Well, a few weeks ago she found out she was pregnant. And I am happy for her. But I also have that resentment creeping up in my mind. I told her I was happy for them but that I was also jealous. She told me “yeah but you already have a kid.” Yes, that is true. I have an almost 12 year old son. Don’t get me wrong I love my son. He will always be my baby, but I was only 21 when I had him. My husband and I were young and unestablished. I just feel like we are at a pint in our lives where we aren’t struggling, are more mature and can really appreciate the whole process of having a new baby. It made me made me feel like she was saying that just because I was already a mother I should be happy with what I have. I’m not trying to be petty but I know she’s had 2 abortions in the past. So I admit that yes I am super salty that she is pregnant and I am not.