Am I being unreasonable to think that breaking up is the only way?

My partner and I have been together since we were 17/18 we are now 25/26 and have a baby together.
He's a great dad and a helpful partner.
However after having a baby (16 months) our relationship is going down the hill in the romance department. It came to the point where we would rather spend time on our phones in separate room than talk to each other. I've tried talking and talking and offering ways to make it better but nothing is happening.
I feel like I started to outgrow him in so many ways and I have almost constant thoughts about ending it. There's not communication whatsoever.
I am scared to be a single mum, we both come from really fucked up families and I always thought that mine will be different. And here I am. However I understand that happy parents is what's best for our girl.
I also tried talking him into counselling but he just laugh it off. I don't know if I should continue fighting for this relationship or just quit.
Don't get me wrong I am not perfect myself and I can be horrible when we argue. It even came to the point where I make comments about our relationship in from of others and I really hate that I don't think before I speak. But I am trying so hard to change myself and make this work on this relationship.
I don't know what I am expecting from posting this but I just need some insight from the outside