S.C.
K. I know this is very difficult to deal with. I am also a SAHM mom with two boys, 5 and 3. With our first son we tried everything we could think of and read about to poopy potty train him. Peeing was not an issue. If I could go back and change the way we dealt with our first son I would in a heart beat. He was so traumatized by us and everyone else making such an issue out of it- that he is still dealing with the repercussions of it all. He now is on Miralax everyday to help him go. With our second son we did not press the issue, we just told him what to do when he had to go, so he was armed with the knowledge, and then let him tell us when he was ready. It all clicked for him shortly after the age of three and he is still going strong.
This is just a process that takes a lot of love and patience and don't worry, he will get it eventually. Just remember, boys usually take a little longer in general to potty train than girls. Sometimes I feel like there is such an enormous pressure on us parents to have our children potty trained by a certain age- and in actuality all children will eventually get there. It's not like he will be walking down the aisle to get his diploma in diapers :)
Just hang in there!