Ex-boy wants to try for baby before he finds a new girlfriend

To make a long story....less long: My boyfriend(D) & I broke up about two months ago because I lied to him. (I was trying to avoid an argument when an ex-boyfriend of mine sent me a text asking me to come back to him. When D asked who it was that text, I told him it was a co-worker, he looked at the phone, and kicked me out of our home). Then about two weeks later, we started hanging out again. D said that we weren't back together yet even though we were sleeping together because he didn't trust me and I would have to prove that I wanted "us" and show him he could trust me. Every time we hung out, I made sure to go back to my home(parents) every night. Last weekend, we went to his brother's wedding out-of-town which I ended up getting fired from my job since I wasn't able to go in. Everything went great. After we got back in-town, he started getting upset with me...saying he needed some space like 2 or 3 days, then he said he couldn't be with me because he couldn't trust me (He thought he could but now he knows he will never be able to trust me). So I gave D some space (only text'd him a couple times). He told me that if I wanted to have sex, then I could call him instead of hooking up with someone new. The only thing was that I couldn't stay the night, I would have to leave as soon as we were done and no showing up unexpected. So last night, I played the "I don't have to have you in my life but since the sex is great Ill use you for that" approach. As I was leaving his place, he tells me this: He still loves me but we can never be together cause of the trust issue. We can have sex as long as its a secret and no one finds out, we are going to try to get pregnant but were not together and we are free to see whoever we want, but if and when I do get pregnant he will be with me and only me. I asked him how we could try to get pregnant and be seeing other people at the same time and not be cheating. He said that if he get in an exclusive relationship with someone and I wasn't pregnant by then, that we would stop trying. He never said anything about me dating someone. He used himself in examples. I don't have any kids and D has one 4 year old but the mother doesn't let D see him. They're going to court for that sometime soon.
I love him so much and I want him back. I would love to have a baby with him too. I lost my job cause I was trying to prove how much I wanted to be with him. I apologized for lying several times. I've never cheated on him. I leave my phone out so he can check it whenever he wants to (not that he does...only sometimes), I tell him when someone calls me, I let him tell my guy friends to stop calling. And now he expects this secret sex life with me, while we try to get pregnant. I don't know what to do anymore. Please Help!