Should I stay or should I go.

So let's start with a little background. So me and my girl have been together for 2 1/2 years. We got together young I was 16 she was 17 I'm 18 almost 19 and she is 19 turning 20 this month. We lived together in our own apartment since about a year into the relationship. We struggled but we got by. We moved from the country to a small city. After we lived their for some time my mother moved from the county to a different small city about 10 minutes from where we lived. About a month into her living out here she asked us to move into the apartment above her so that we could easily help her babysit my little brother when she worked. We agreed and have been living above her for about a year now. So to the present now. We have been struggling lately she works in a kitchen at a rehab home. I work at a gas station deli as a delivery boy. Now that its getting cold it seams buisness is slowing down to the point where they are only having me work like 15 hours a week and that's in 2 days. So I'm not making anywhere near enough money to help with the bills. My mother offered to let us use the bedrooms upstairs to stay in. She is only asking for 300 a month or whatever we can habdle . She is being super chill about everything. She knows we smoke she even dabbles now and again so no worries their. But we set up a small amount of stuff our bed and brought our cats to see how it feels tonight. I'm just wondering what my fellow blades would do in this situation. I could use the relaxed environment to find a better job and we could save money to get a nicer place and a few things we need but being down here it feels really different and I have minor worries. But let me know what you guys think and what you would do in this situation I just wanna get some outside oppinions. Sorry for the long read. I'm a little baked.