I was, in my opinion, just casually sleeping with this guy. Like, Netflix and chill before Netflix was an online service, maybe even before they posted CD's to you - I don't know. But anyway, he'd message me, and I'd go over to his and we'd have a few drinks (he always supplied the wine) and we'd shag, and go to sleep (he quite liked to watch Blackadder as he dozed off) and I'd say bye in the morning until the next time. It seemed super casual to me!
One night I was at his and he'd passed out/fallen asleep when my unrequited love, Man of my Dreams called my mobile and asked me to meet him on a street corner ASAP. I sneaked out of Casual Shag's house and met Man of my Dreams in the moonlight, stealing back to his and beginning weeks of incredibly hot and steamy sex.
Casual Shag continued to text/call, but I just ignored him; I guess I ghosted him. It didn't seem particularly unreasonable to 18 year old me, and really, mediocre sex, wine, and Blackadder once a week or so didn't seem like much of a commitment anyway.
After a couple of weeks of ignoring Casual Shag's contacts, I was in bed with Man of my Dreams one morning (although realistically it was probably closer to midday) when someone started banging on my door. "RACHEY CAAAAAAT! ... RAY-CHEY-CAAAAAT ... RACHEY CAT I LOVE YOU OPEN THE DOOOOR".
I was all for ignoring him and waiting for him to go away, but Man of my Dreams was quite appalled and insisted I get out of bed, go downstairs, and break up with him properly.
I didn't mention MomD to Casual Shag as I stood barefoot outside my house asking him to go away and not come back.
Man of my Dreams dumped me in a similar way about six months later.