Does this make me selfish??

I have this guy best friend and we have been friends for 15 years. We are 25 and 27. I love him as my best friend. After he went through his divorce and got full custody of his two young kids, I'll be honest, we spent a lot more time together. It's like a huge burden has been lifted off of him since the divorce.

Long story short. Nope I have never ever slept with him. I drunk kissed him when we were in highschool but that was it. Just best friends.

Here now he recently told me he loves me and didnt realize just how much he loves me. He wants to be with me and try dating. I told him no. For two reasons. I don't want to ruin our friendship. Second reason is I don't want kids. I'm not very motherly. I'm like that super cool aunt to his kids. I love his kids. But honestly I don't want kids. And I have been that way for years. Having children isn't for me. And the reason for that is my parents were both not so wonderful people and I really have trust issues and don't want history repeating itself. I'd never want to put a child through the shit my parents put me through.

He now thinks I'm selfish for not wanting kids. But again. I HAVE ALWAYS BEEN THIS WAY. I haven't wanted kids since I was like 12 years old. I like dogs.

It's not like I'm lying to him. Not like I changed my mind. I'm not going to invest in a relationship where there are kids if I'm not into kids. You know? I've been upfront.