I am just saying that it's easier said than done to just "break up" when certain things happen in a relationship, whether there are kids or not, or marriage. That's why I started the thread, to ask for help and advice, not to be told that I am leading him on. I know the reasons for which I am still with him and only I need to know them. It's obvious that after over 4 years of being with this person almost constantly, I do care about not hurting him, and it's my priority now to do the least amount of damage possible to his ego and his life in general. But like Indi said, there undoubtedly were signs, conflicts, and all the rest. Things still haven't changed. And now there's complacency. And my guilty conscience. And the need for the things that are missing between us.
And just as a side note, i only just recently realized that there wasn't actual chemistry between us. Partially because I met someone with whom there WAS that real, rare thing that clicked, and partially just because now after years, we really don't have that much to say to each other. It's sad and it breaks my heart.