I've had a few relationships where occasionally we used psychedelics together, that was cool. One where we smoked weed a few times, which was good, but drinking together was bad because I'd get too drunk and act out, which made him mad and started fights. Another one where drugs weren't involved because he smoked weed with friends, while I was not currently using anything.
Another relationship where I introduced an ex crack addict to psychedelics/dissociatives and raves. It was fun. But while I was in prison for two months, he got heavily into Ketamine and fell apart, lost his job & kids. Not wanting to go back to jail or prison, I didn't get back with him. That proved to be a smart choice.
I dated a guy who did not use drugs or drink at all. I was using drugs four months per year- mostly psychedelics& dissociative, some alcohol and opiates. He just asked I didn't get high around him. That was easy, but spent less time with him during "drug months." Our relationship ended because after a period of experimenting with heroin, I overdosed when I tried IV. He demanded choose drugs or him. Having quit heroin, I saw quitting psychedelics as stupid and more a choice between choose him or myself.
I next dated a heroin addict, basically as rebellion. I planned to dump him before moving to Vegas. I tripped more often, introduced him to Ketamine and he loved it. After a few months, I started using heroin, flipping between some use and binges. I moved him to Vegas. He was a different person once we were alone (as opposed to living in a house full of people) and didn't have roommates. He'd black out on benzodiazipines also and become very mean. I didn't have a job or friends,felt so alone.. Did heroin whenever I could, which became more often when I became employed. I got hooked. It was cool for a while, but he felt guilty. As time progressed, there was a lot of drama and manipulation and fights and so on- him being on a pain clinic and selling some pills with a once monthly SSI check, me working and gping to school on and off. But we were dependent on each other in so many ways, living together for nearly two years after breaking up. He tried to date other junkies, they used him a lot (was kinda jealous how he'd contribute to monster habits each day while it used to be hell just to get 10-20 per day put of him. Drug jealousy, not romantic.) I had decided never to be with another junkie. At the end of living together, he borrowed from me against rent and bills to support himself and this chick, eventually we were evicted and everyone split off.
I am currently with a meth addict. It actually works very well. I was on meth for a year when I was 19, so have some insight, but zero desire to use it. We both understand addiction. He will use heroin on occasion, but I am mindful of frequency as is he, and plus he doesn't want it that often. If he runs out of his drugs, he just sleeps. He also will tweeked out and make things for me or go out gambling, so aren't constantly in each other's company like I was with the junkie bf, so don't get sick of each other (not that I see myself getting annoyed by him anyway.) Everything is smooth and no drama, no wretched fights and taking shit out on each other and so on
His last relationship ended up being bad, some similarities to my prior one but he was the only one on drugs. We are both pretty self sufficient but will help each other back and forth when the other is out of drugs and unable to get money. I really didn't expect to get along so well with a tweeker, but I do. Both of us like weed and psychedelics, but mainly having opposite taste in our drug addiction works very well- there's understanding but without trying to get something out of the other one, or running out of money or drugs whole supporting the other's habit, etc.
It seems that both parties using weed or some psychedelic/dissociatives probably works best far as drugs in relationships is concerned, or a situation like this where both are hooked on something entirely different.
