I do't know why I feel the way I feel. Depress I want to stop feelin this way. I'm scared.?

I feel overwhelm. I have another but he is not what I want And I can't get It threw his head that we need to be friends simply because he is my sons father. I've been threw a lot with one of my kids catchin on fire to where I feel like i can't go on nomore and doin a 360 mby myself and he is not helpin I feel like I'm losin my self just because of him . Ive been threw worst but since I was by myself with my two boyzz I had a better grip on life then then now. What should I do