Somethign I had an idea for and just jumped into it to finish ^_^
Stiles and Lydia have broken off of Scott's pack and have joined Derek. Derek's been keeping an eye on Jennifer under the guise of a relationship. Stiles and Lydia ask for answers, but her keeps blowing them off in order to protect them. This takes it's toll on them physically and mentally. They start questioning Jennifer and Derek and going off to fight supernaturals on their own. Derek gets hurt and Stiles and Lydia just completely break, but won't forgive Derek because of what he's done after they put their full trust in him.
Lydia finally breaks and Stiles is mad and goes to Derek's loft they fight but Stiles is hurt. Lydia hears what happened and goes to visit Stiles to talk. Stiles scolds her and she leaves. He sits at his desk remembering the first tie he and Lydia completely went to Derek when Boyd was killed, and he talks with his dad. Sheriff Stilinski convinces Stiles to at least accept Derek's actions.
Stiles and Lydia try to get over Derek by continuing school life with lacrosse, but after Stiles' game they crash again and can't forget Derek as their alpha. Their parents begin to worry over them and Stiles is hurt put in the hospital after Lydia and him go out to fight some supernaturals. Derek tries to reconcile but talks with Scott and leaves.before Stiles can talk to him.
At the end, Lydia and Stiles are at the school and something saves them. They find out it's Derek and Lydia hugs Stiles in relief.
Note: The Red and Blue are flashback scenes of Stiles and Lydia. Blue for Lydia and Red for Stiles. Some scenes are both red and blue meaning both were present and it's seen through both their eyes.