M.T.
You do change after having a baby. You grow up, and you are also tired after having to constantly take care of a little one. It is easier to want to just lay down and go to sleep after the baby goes to bed ignoring each other, and sometimes money has alot to do with the attitudes too. It is expensive to have a baby and to raise a child and if he is use to having a little money extra in his pay check and now he doesn't, that could be bothering him also. Also, if you aren't married, you have to ask yourself if he was really ready to get pregnant and have a baby. Sometimes accidents happen and you have to deal with it, take responsibility and go on with life. But maybe in his case he is having trouble accepting the new life. So be patient with him in that respect. On the other hand, you are still having hormonal changes taking place in your body and you both need to be aware of that and be patient with yourself there, too. It sounds like you all need a night out to yourselves every once in a while. You need to go out and eat and sit and stare into each others eyes and talk and talk and talk, hold hands and walk and take your time. Make sure you feel comfortable where the baby is so you don't worry about hurring up and getting home to make sure the baby is alright. I am a big believer in taking care of the relationship and making time for each other.
Don't worry. A little change after a baby is to be expected. Sit down and have a talk with him and tell him that you sincerely want it to be the way that it was but you also know that it will never be that way again because you have another little life now and he may not be getting the attention that he once got from you but that doesn't mean that you don't love him anymore and that he isn't important in your life anymore. Then suggest to him about going on and then after the baby goes to bed at night, snuggle with him and watch a movie or just lay in the bed and talk. Just relax. It won't change over night. But in time it will get better. Just remember to be patient with him. God made women strong on the inside for this very reason. So remember you are the strong person and having a baby was a big change to your body, well to men it is a big change in other ways... they aren't as strong as you are in that department.
You will be just fine. Just be understanding.... and pretty soon you will probably be married. Be the kind of person that he is so excited to be with and to get home to. Relationships aren't meant to be hard and you shouldn't have to do hard labor to keep them going, however, there is regular maintanence on a relationship just as there is in anything else.... like your house or your car.You have to change the oil in your car to keep the motor running good. But if it gets to where you are having to replace the motor every week then it is time to trade it in. Same with a relationship. You and your husband need to change the oil periodically so the motor will stay in good shape. When you look at it like that, you can understand a little bit better.
Good luck and let me know how it goes. Keep your chin up and have faith and confidence.