It's all falling a part

When things start to fall apart!! How do you cope with it?? The love and affection is gone and he makes me feel worthless😔. He is always putting me down when I cherish the ground he walks on!! I make sure he has dinner in the table everyday when he comes home from work I pack his lunch every morning!! I do his laundry make sure the house is clean what else can i do??!!! The only time he wants anything to do with me is if he wants something or wants to have sex!! He never gives me compliments or tells me thank you!! He comes home from work and plays video games untill he goes to bed he ignores me and my three kids (they are not his) but I had tubal reversal a year ago for us to try to have one of our own. I'm just starting to get over it all I think it's time to move on! I feel like he is always hiding thing bc I caught him paying for live web cam models more then a few times!!! I can't trust him I've lost myself I'm not happy at all and I'm always depressed feeling like I'm not good enough😥