Will drugs enhance my relationship?

So my boyfriend of a year and a bit keeps persuading me to try cocaine. He’s already persuaded me to try mdma because he said it would make the relationship better.. nothing happened, I was just insanely fucked up and had to look after him the whole night because he overdosed.. I don’t know what to do because he makes me so happy but all he wants to do is drugs and have sex instead of going out to do normal people things. What’s worse is that he wants me to pay for the drugs because he’s currently in a huge debt from the last clubbing session he went on. Can anyone give me some advice please, it would really help. Many thanks!