Is it worth it? (Sorry its long needed to vent)

I don't know what to do anymore. My husband and I have been together 6 years married 2. We have 2 wonderful children together. But for the past couple years it's been rough. And getting worse. I know it's not healthy but I have always put my husband first. Before myself. Now I put our kids and him first. And somewhere along the lines I forgot about me and forgot what makes me happy. Well lately I've been trying to regain that happiness. And it's been making him mad also because I've slacked on always making him happy. Well we got into an argument today because I have been looking into getting a pet. And he threw a fit saying "absolutely no cats" and after fighting about it he said "whatever get a damn cat but the first time it shits on the floor I'm packing my bags". And he has made comments like this before. Joking about divorce and cheating. I find that extremely disrespectful and have told him that. I also have depression. And he doesn't believe it's a real thing. He will make jokes about other ppl "claiming" to have depression and anxiety to get attention. So I just kind of keep things to myself and don't say anything. But it really gets to me. I've had a really hard life and today made me realize that if he would threaten to leave over a cat. Then he doesn't actually care about my happiness and idk what to do. I cant financially up and leave and we have 2 kids. He is an amazing dad. Wonderful. The best father to my kids I could ask for but he severely lacks in the husband department. I feel more like his slave than his wife. I've tried talking to him, even threatened to leave. But it only changes for a short time then goes right back.