Am i being dumb?

I'm a stay at home mom. This was a huge transition for me as I was going to school and working. I wasn't doing that, I was at the gym or working with my husband. He's a general contractor and owns his own business so we would usually go check up on the employees sometimes with him. Once I had my daughter he wanted me to stay home but I refused because we needed money so I went back to work. I was only able to work for about three weeks before my husband said I needed to quit my job because it was making him lose money, as he had to come home earlier to take care of our daughter. My daughter also would NOT stop crying at night because she was used to breastfeeding. Every night that I would come home

From work, he seemed so overwhelmed. So I decided to leave my job. Now, I know a lot of you might ask why I don't put my daughter in day care. For one, we only own one car. Which was also why he had to come home early, to give me the car. Two, I don't want my daughter in a day care. Nothing against them, that's just our choice. Third, we don't have any other family near by. So now I am a stay at home mom. I'm home all day and it's very sad sometimes that all I ever get to see if the walls in my house and my daughter. While my husband does work his ass off, I kind of resent him for being able to get away from home everyday, socialize, see other things. So here's my problem, sometimes my husband asks if I want to come with him to run an errands or go pay one if his guys real quick and then proceeds by telling me that at least I can get out of the house. Or that he feels bad that I am just home. I don't really feel like he wants to bring me along, I feel like he does it out of sympathy for me because I don't ever go out. I wish he would take me because he wants me there and although he's nice to me when he does bring the baby and us with him, a part of me feels like he just feels bad for me. I don't know why this hurts me. A baby really changes relationships. You know when someone gets a job and say it's a life changing for them? Well it's not, a BABY is a life changing thing. A real life changing. And I feel like my husband and I all we ever talk about is bills and how to be parents. Which that's what we are and I don't have any regrets just wish we would be the same as before. I wonder if my husband still loves me the same...