Just need to rant!

My s/o and I split the bills (he pays some I pay others) well about a week ago I forced him to show me his Amazon and eBay account history because he kept getting packages. Needless to say from Dec till now he's spent almost, if not more then $1000 on model trains and track! I was pissed because I just started back to work sat from being off for 6 weeks due to surgery. My mom has paid the rent for the last 2 months and our electric bill has been let go (my part of the bills) he hasn't even attempted to step up even though before I had the surgery he said he would! Well today I went to leave for work (3rd day back) and the fkng repo man was hooked to our car! He hasn't made a payment in 3 months! I had to call work and explain to them why I wouldn't be in! Thankfully I work for a really good company with awesome people who all have agreed they make sure I get back and forth to work till I figure something out. After the missed payments, repo fee and impound fee it will be well over $1500 to get my car back! I am so lost at this point I don't know what to do. My bills don't even cost that much a month. We use to go to therapy and after finding out how much he spent out that bs I called and got us back in and we were supposed to go Friday but that ain't happening now that we don't have a car! At this point I don't even know what to do? I'm lucky if we have sex once a month (5 times in the last 4 months and he admitted last week that, that even feels like a chore to him) and he obviously doesn't give a fk about bills. I've been feeling like I'm in a room mate situation that just so happens to have children for the last 2+ years and this just makes it feel more like that! I guess I will just end this here as I could go on and on. I will continue to enjoy my captain and coke in silence since the kids are asleep and he sits on his computer as usual while I try not to cry!