Encouraging my Boyfriend to be Healthier

Hannah
Hey guys! I'm new here. The community seems pretty fun. I was just curious to hear what y'all think about my dilemma. I just moved to another state to live with my boyfriend. We're super broke but he spends money on cigarettes and smokes a pack a day (and I have really bad allergies so I feel like shit when he smokes around me but never say anything). He and I are both overweight, and he's diabetic (but won't take medicine for it anymore.) We can't afford to eat anything but fast food at the moment. I've been wanting to get in better shape and eat healthier and I'd love to have his support. I really want to talk to him and get him to eat better and maybe stop smoking, but I don't want to stress him out since we've been going through a lot lately. Any advice?