Yes, I know what catfishing is. I saw the Catfish years before anyone knew who the hell Manti was. The motive of the catfisher wasn't to embarrass Ryder, it was to get close to him without risking rejection. Marley and Jake already dealt with their issues with Ryder last episode, plus Marley isn't petty enough to do something like that and Jake isn't clever enough to keep the charade up.
Yes, I remember the episode where Blaine kissed Rachel and they sang "Don't You Want Me". That doesn't mean that Ryan Murphy isn't going to try to pull some stupid "Blaine suddenly likes pussy" crap. BTW - Blaine and Sam are friends, (and I hope it stays that way. All you guys that keep praying for the straight guys to start turning gay can go to Broke Straight Boys for your "I turned a straight guy gay!" fantasies), but you don't see them holding hands and cuddling like Tina and Blaine were, do you?
As for Jane Lynch, she's been awesome ever since her breakout role in Best In Show. She was amazing in Glee's first season....until the writers started to make her an insane schizophrenic. I don't blame her for leaving before they have Sue shave her head and beat up the students with an umbrella while screaming, "It's Sue Sylvester, bitch!".