Remember when the devs said Julian has constant nightmares and wakes up screaming at night?

Add that to Morpheus having the ability to enter dreams, and not being really able to control it.

Morpheus usually doesn’t tell he is a dreamwalker to anyone, so of course he wouldn’t mention it to Julian. In the first times they share a bed everything is fine. But one day Julian is having one of his nightmares and Morpheus accidentally wander through it.

Julian wakes up distressed from his nightmare just to see Morpheus is also awake, and crying. (In my HC the nightmare was Julian being hanged). He tries to say it was just a coincidence, that they both had different nightmares but Julian don’t buy it so Morpheus finally open up and explain about him being an oneiromancer. Julian says he doesn’t mind it the slightest.

However, it happens again and again. So Julian decides it would be best for Morpheus if they stopped seeing each other. Not because he is scared of Morpheus abilities but because he is worried about him, he doesn’t want Morpheus to suffer from his nightmares. Morpheus’ insecurities go over the roof and he is sure Julian is leaving him because he thinks he is a freak like everyone else in his home town used to think.

They eventually work this out tho.

this is 100% canon.