Advice needed!

Hi peoples of glow, 
Just needing some advice here. 
I'm 18 and have bipolar 2, at the moment I'm not 100% stable. My boyfriend is 19 and working (but for cash). We recently got kicked out of his dads, so we stayed at my mums for a while. 
All was well until my mum had a massive go at me, said she doesn't feel respected by Jonas, doesn't have faith in him, he's lazy, he's rude, etc etc. 
he doesn't talk to her much because she scares him and he already didn't feel welcome. 
Anyway, I told him what she said and he packed a bag and went to his friends house, he was balling his eyes out, confused and quiet upset. 
I understand where she's coming from, but at the same time I feel like all she's interested in doing is bad mouthing him to me to try and convince me to break up with him. (NOT GOING TO HAPPEN). 
We were planning on moving out and getting our own place asap, I'm not sure how to though, I get government support (barely anything) as I'm not able to work at the moment, and because he's working for cash, he can't prove income or employment. 
I'm also worried that if I try to move out my mother will harass me and just put me down. 
She keeps insisting I can't take care of myself and that I can't live on my own and that I'm not an adult (legally I am) and that I won't be better anytime soon and I should just execpt it. 
The thing is though, I do feel like I can take care of myself. 
I know it sounds stupid, but when my partner and I aren't/can't be together I literally feel devastated and like I just got punched in the chest. 
I don't know what to do, or how to help the situation or what I can do, I am taking steps to fix myself, medications - therapy etc etc. 
Any advice appreciated but PLEASE be kind. I'm honestly struggling.