Dealing with a lot

I'm so mentally exhausted and I'm depressed. I've been dealing with a lot lately in my relationship and in home life that I just can't handle it anymore. I want to walk away from my relationship but then again I don't. I feel like he has made my depression worse lately. He's a very indecisive person and he will say he wants to live together (my lease is up in January) and then he'll change his mind and it's stressing me out.. Yesterday I had a mental breakdown and went to the fishing dock and sat in my car crying for 3 hours. Pretty much everyday I cry bc I'm not happy at all and I honestly don't know how much more I can take. I also have panic attacks and anxiety so that doesn't help... I feel like I'm failing as a mother and as a girlfriend..