How to break up with bf

I just need more and he’s not giving it to me. We don’t really share any of the same values, morals, humor, and we totally have different outlooks on relationships. I’m almost due with our first baby and we’ve been together 2 years. I just know I deserve more respect and he’s had ample opportunities to do so but doesn’t make any changes. He’s working 2 states away and I’m home to have my baby. How can I break up with him, what do I say etc? I’ve tried before but he always talks me back out of it and I just want it to be over. Please seriously help me