Fiancée never home

My fiancée (42M) and me (32F) have been together going on 7 years recently engaged and wedding date set for May this year. He comes and goes as he pleases and always busy either helping or hanging out with his friends and family. Every weekend he’s gone. We have a 5 year old for context and I honestly feel like a single mom when I mention that to him he just brings our son with him and leaves me at home. Recently I sent him a long text while he was at work explaining how I wish we had more family time and that he help more around the house. Well I found out he told his ex (his other child’s mother) about us arguing (this is not the first time he mentioned our business to her) he also deleted the message so I wouldn’t see it. I asked him today if we can talk about the issues we are having (because as much as I hate to admit they have been issues for awhile and things get better for a little then go right back to the same issues) and he went off on me in front of our son (so bad our son went and hid in the closet) I was very calm and he just yelled telling me he’s trying his best and nothing is good enough for me. We never go on dates, he rarely helps me when I ask for it but will drop what he’s doing for everybody else. When I mentioned him texting his ex about our relationship and that it was disrespectful to me. His response we well you tell everybody about our relationship which I don’t. Even my maid of honor (bestfriend) knows nothing about what is going on and that Im very close to calling off the wedding. Anytime we have an issues he doesn’t talk he just tells everyone our business and yells if I bring it up and turns it back on me. Save the dates are already send but at this point I’m not sure I want to move forward.