the only reason why they made Reef/Lo canonwas to make the show look less like 6teen.
Lo is not over ReefAnd one episode will be about her trying to get over him (with Fin's help of course)
Lo and Reef will get back togetherTo troll the Reef/Fin shippers
Reef will form a short-lived relationship with EmmaTo troll/confuse the shippers.
Lo will treat Reef like crap, but they will not break up.To spite the Reef/Fin shippers.
If a third season is made, one of the plot points will be Fin dealing with her unrequited love for ReefBut a third season seems very unlikely.