If it is as you guys say, that Elli is the one who dumped Sayn, this has been a catastrophic turn of events for the leech. He finally gets Ellie to dump Sayn. He is ready for sex all over the appartment, to be there for a horny Ellie in mourning, and then, plot twist! Sayn comes back and Leech is suddenly homeless again. Replaced by a giant teddy bear. Hung over as fuck he has to pack his bag and leave in a hurry. He lost it all.
Leech tried so hard, and got so far. But in the end, it didn't even matter.