Amazing guy .. BUT...

So I've been with this guy for four years and we've been living together now for a year. I really don't want us to move in together until we got married but he just kind of ended up here. You know how it is.. he spends the night all the time and all that... unfortunately.. he is not a great provider financially. I pay the majority of the bills and buy the groceries.. then his disabled son had to move in with us because he was having problems with his mom. Before he moved in I told my Boyfriend I thought he should get a place alone with him. He's never lived alone or been a full time parent. I thought it made sense for them to have alone time. Over the last couple of months money has been really really tight and I have been paying the rent during this entire time he helps with food and other things he super helpful with the kids but now we are coming up to a month where I'm not able to pay rent because my income has changed significantly. Really stressed... he doesn't seem to be taking this as seriously as I am.. if I get evicted me and my 2 sons will be displaced not to mention his son and him.. but I have a support system and can go live with my mom or even my son's father for a while till I can get on my feet.. should I or should I just stay with him get a 2 job and weather the storm together?