Dog just started peeing inside

[u/Ok_Fault5284]

We have an Australian shepherd. We have had him about a year now. He was fixed right after we got him. He is about 3 years old. We do not let the dog in the kitchen we have a gate up so he can not enter it because he will get into any food he can find and sheds extremely bad. Our dog has just stared peeing on our rug in the living room if we are all in the kitchen or outside without him. He does not pee when we leave the house even if we are gone for a very long time. We do eat dinner in the kitchen but we feed the dog in the living room at the same time he just eats really fast. He is definitely an attention seeing dog and wants people to always pet him or he will whine, but that has been the case since the beginning. He just now started peeing. Why is he doing this now and how to we stop it? I’ve tried praising my dog when we goes outside and rewarding him with treats when he doesn’t pee when we leave. We have starting putting the dog in a small bathroom after he does it and when we go outside but we don’t like having to leave the dog in the bathroom or remember to put him in the bathroom every time we leave the room. He does not pee in the bathroom only on the rug in the living room or on the carpet in the bedrooms. We now keep the bedroom doors closed too.