Bf and Weed

Ok just wanna start off by saying im okay with smoking weed. I have no hang ups. i do it sometimes too. however:

my bf used to smoke weed all the time and it made him super distant towards me, super lazy and unproductive. he hated how that felt so he stopped. and he really loved how he felt. this was two years ago. a week ago he told me he went to go get some weed just to have for stressful days. And like im good with that. Im also not his mom so he can do whatever he wants. however, he’s been super distant from me this entire week, sleeping in through work (he works from home), staying up until like 7am. currently we have plans to hangout and it’s 1pm and I haven’t heard anything from him. I know he’s been smoking it every day because of this change in him. im getting really frustrated honestly. I don’t wanna be like his mom so I feel awkward saying anything but it’s really pissing me off. he’s supposed to be here around 2 and I think he’s still sleeping rn so he’ll be late…. for the third time. I just feel so sad and alone when he’s high. this addictive behavior is worrisome for me, especially when im thinking about having a future with this person…..