Share 'What do I do???'

i have been with my significant other since 2000. I have a son by him that is 6 and a daughter that is not his who just turned 11. We have had a lot of ups and downs and in 2006 we got custody of his three children from a prior relationship. he also has another child by another woman. Before they came to live with us we was having another down time and was even talking about leaving each other. O…