Where did the feeling go??

I've been with my daughter's father for 11 years.... we just had our baby March 8th, after all these years. In the beginning everything was going great. We were so close and affectionate and really inseparable. But since I got pregnant it's like there's nothing between us anymore. I love him and I know he loves me, but I feel like we've grown apart. I'm not bragging, but I am a very good woman. I do everything I possibly can to make sure he's happy. However, I feel like it's a one sided thing... I'm a stay at home mom and I don't get any help, even when he's here. I feel like I'm doing too much... I am worth way more than this. And I'm clearly not appreciated. I try so hard to keep things together and get no credit. And I don't know if you've been around someone and you can tell by the way they are acting and their body language that you're getting on their nerves. Well I feel like that a lot of the time. And it's crazy because I don't do anything to get on his nerves... I'm just wondering, where did the feeling go?? And what changed things?? But the way, it's not an option for me to try to discuss all this with him.... in fact, I hold a lot inside because he's not interested in anything. I know, I know you're probably thinking why don't I leave him... it's harder than you think, especially after so many years and a baby involved now. I just wish it was the way it used to be.