New to this

How do I tell my boyfriend I want to try again after deciding to end a pregnancy because we wasn't financially stable it wasn't his choice I did it behind his back and he found out by reading a text in my phone about how sad I was about it to a friend we have had our share of ups and downs from cheating to breaking up etc I have an irregular period since ending my pregnancy and honestly want to try again he has a son already with an ex I have no children and the mistake I made was in the beginning of our relationship I'm in a better place as a person now and our relationship has grown how do I even start the convo ?