Blaine left Kurts house as soon as he could, both of the boys knew that neither was going to fight fair in trying to win over Sebastian.
Why did Kurt have to like Sebastian as well? He'll obviously choose Kurt!
When Blaine first met his best friend several years back they were in high school, everybody loved and wanted to be Kurt and because of that, Blaine was liked by many.
If Blaine really liked Sebastian then he would have to fight just as hard as Kurt, probably harder as his flirting skills were no where near as good as his friends.
Opening his flat door, Blaine walked over to his chest of drawers and fished out his phone and started writing a text, it read;

R u in town?
Need ur help
- B .x

Blaine put his phone back on the table and turned on the TV for some background noise, If he was going to win over Sebastian then he would need all the help he could get and he wouln't do anything too drastic in the fear of losing his best friend. Besides, he knew Kurt would also do everything he could to get the boy. Mr Hummel was very competitive and had been ever since Blaine first met him and now it was his turn to become the competitive one.
Flicking through the channels until he found a good TV show the boy sat himself down ready to make camp for the night, as he reached for some crisps his phone began to buzz signalling a new text.

Indeed I am,
By your house, see you in 5 x

Kurts ex boyfriend had text him back.The games had just begun, he had a chance of winning.

There was 3 sharp knocks on the door, Blaine got up and swung the door open.

Cooper stood in the doorway and flashed a smile

'Evening little brother'