Is he using me for money

So me and my bf smoke weed almost everyday my bf is on Benifets so I tend to pay for most of it. He always asks is if I’ve sorted money for us to get weed as he can’t go without it and says it impacts his mood. But when I don’t have money he will pay vice Versa. But i don’t know what to think is he just using me for money or am I being paronoid we’ve had a few arguments everytime we argue he threatens to leave I went out with my friends and he asked why I would wanna go out for drinks with my friends when I could b with him when we argue he puts the blame on me resulting in me saying sorry each time