<human>: Can you give me a shortened version of the text?

We have been dating for a while and when we first started, he didn't smoke. After about 6 months, he started to. It doesn't bother me that he smokes. I used to do it. The only thing about this situation is that he spends ALL his money on weed, and if he has enough to cover him for the next day he won't go to work. I have told him multiple times that he can not choose a plant over me, I have left him for months and after he stops smoking, come back for him to just start again. He spends more than 140 a week, leaving me to pay most of the bills. I somehow can't get over this hope that he will change. I mean... I made plans for the future with him and now... I'm not sure. He says he doesn't care if I leave him when I threaten to and then when he sees I'm serious he says he will change. And does it for a week or so... and then the cycle begins again. Our lease isn't up for another 4 months, so we are stuck either way.. what do I do? I don't want to lose him but I won't let myself be taken down with him.
<bot>: Boyfriend spends all his money on weed, promises to change when I say I'm leaving. Changes for a week then goes back to it. We live together.