Can someone help a girl out w some advice?

I’ve been with my now husband since 2012 (met in the 10th grade) married in 2018..We got married a month before our son was born, he will be 3 this year. How do you know when enough is enough ? How do you know when it’s just not meant to be anymore ? I would never down him and say he’s a bad man, because he’s not. He just has his ways and I’m not perfect either. I have my ways. But, it’s just ... things have been bumpy almost our entire relationship ..and I know I know, marriage is work and sometimes it can be hard. But, I just don’t know when to call it quits. Every argument or disagreement has to end with him always talking about a divorce or leaving me. For example, this past weekend we finally had a little mini vacation at the beach and we’re with our friends (another married couple and just a single guy friend) and the single guy friend commented on every female and talked about her ass and stuff as were all walking and one female ofc she was nicely fitted with a big butt and flat stomach and my husband decided to watch her walk by us and even turn to see her... as I’m right there.. my comment was “well, did you get a good look”? I had no attitude or nothing.. didn’t curse holler nor scream and everything just escalated from there. Mind you, im 7 weeks pregnant with baby #2. He completely ignored me the entire weekend I tried to talk to him and explain to him just hey you hurt my feelings..(he knows my insecurities bc of being raped and so much history in my past w issues) so I left the beach early to go back home.

All of this just to say, arguing over minor things and threatening to divorce me is stressful enough. I work a full time job, come home to cook then clean then bring him his dinner to the living room fix his lunch for work the next day all while dealing with our 2 year old who I have to fix separate food for bc he’s a picky eater... but it’s like I never get credit...

sorry for the long post but... just a young girl who really needs some advice and motivation and help