I have been through almost the same thing. I married my husband in 2006, we had a baby right away. After having her I didn't think he was what I wanted we separated for 2 weeks got back together for 7 months then separated for 3 months, got back together for 3 months, separated again for 5 months and got back together and we have been back together for over 2 yrs now. Just a few months ago I got the same feelings again and it was a rough couple of weeks. We got through it but I constantly think "Is this the life I am supposed to be leading?" I love my kids but I have such internal issues that my marriage suffers. That's when I sought therapy and we are working through what it causing this. I go back with him for stability and normalcy for my kids sake. I don't have any advice but just so you know you aren't alone