Kinda long:

So a little back story. Me and my husband have known each other a very long time something like 15-16 years now (he is my sisters best friend that’s how we met) we hooked up a long time ago when we met but never moved forward with any sort of relationship (as I was really young)but both liked each other a lot and always kept in touch, we both ended up in other relationships and have children from those relationships. I have 1 daughter who is almost 15 and he has 2 sons 11 and 13, we just had our first child together in May of 2018 who is now 15 months. Here is the problem I want another baby BAD and he does not I’ve always said I want 3 children of my own but he thinks we have too many am I crazy for wanting another child? I mean there is a really big age gap between the youngest boy and the baby and I feel she needs to have someone to grow up with. With his saying we have too many already I get it but we share custody with the other 3 50/50 so they are not always at home with us. I really really really want another baby, I loved being pregnant and I love the baby stage just as much but I also want our daughter to have someone to grow up with. How do I get my point across to my husband how badly I want a baby so he will understand where I am coming from? Am I that crazy for asking for that? It makes me feel really sad and down when he continues to say no and not see or consider where I’m coming from. Please help how do I approach it? Will this always be an issue? Should I lay off for a bit and see if he changes his mind?