I want children but he doesn't...

Angie

my husband and I have been married going on 3 years. we have been together a total of 8 years. since day 1 he has known I want children, and always agreed he wanted more children as well. I say "more" because he has a son from a previous marriage, who's an amazing 9 year old. I love being a step mother, but it's not the same as having your own children. My husband is 32 and I'm 29. now that we are married and settled into our careers, he has decided he doesn't want any more children. He says he's happy with "life the way it is." we did not agree on this. considering I have PCOS and pushing 30 REAL fast, I feel a weight baring down on me. The clock is ticking. I have been off birth control for over a year now, just waiting on the moment for him to change his mind, but he's not budging. this whole situation has me stressed, depressed, and emotional. It seems like everyone around me either pregnant or finished with their families, and I can't help but me bitter about it. I feel distanced from my husband who refuses "finish" inside of me because he thinks I'm trying to trick him into getting me pregnant. That's not the situation at all, for I dont want to get pregnant and have him spite me and hate me because that's not what he wants. It's hard to get excited about possibly having children when he's not. I can't help but think that if he didn't have his son, he would want a child with me. I recently told him that if he doesn't want children and he's serious about it, he needs to let me know now so we can get a divorce. I can't imagine life without him, but I also can't imagine my life without children. am I wrong for this? Is it wrong for me to not want to sacrifice my happiness for his? I feel selfish, but I always feel like he married me knowing my desire for children. any advice or words of wisdom would help.