Could be considered as continuation of this Great Work.

Having his mother as great support and female figure, Kurt is as highty as in canon but know how to defends himself thankfully to kickboxing. 

In the season 2, instead of backing off from his duet with Sam Evans, because of Finn's fear, he kept this decision mostly because his mother doesn't seem disturb. So, after the duet, the two boys grow closer and eventually end up dating. Kurt still goes to Dalton to spy on the opponent. He meets and befriends Blaine (talking about bullying -slushy- and Dalton zero-bulliying policy) and totally forgot about spying. With the help of his mother and probably of Santana, the anti-bullying is create and they maintain it mid-season three.

Sam could have end moving out with the Evans or could have stayed at the Hummel.

Either way, Blaine could still be a narcistic and controlling in a relationship, Sabastian transferred prior to the start of the third season and was as flirty as in canon... but toward girl, hence a womanizer, but being somehow intrigued by Kurt.