Confused...

My boyfriend and I have been living together for three years. He has two children, which I love, but I have none of my own. He likes drinking with his buddies at least once a week, and going to eat with them, but never has enough money or time to take me out. We literally have been out twice in three years together. Don't get me wong, we go and do things he likes to do .... but he never goes out of his way to do anything for me. I do everything, laundry, take out the garbage, cook, house work, groceries, and then he complains if I don't do something, or he has something smart to say. For example: I don't have to be home for you to do laundry. Frustrated! We do have some good times together, but I feel like I'm not important to him.