You broke up with Louis 3 months ago and you two are now only good friends with each other. But when he finds out you have a new boyfriend he gets annoyed and jealous for some reason

Even though Louis acts like he doesn't care, he is annoyed inside knowing you have a new boyfriend

He is now trying to distance himself from you to try not to think about it too much

"Emh, Your boyfriend is better than me huh?" He said in an irritated tone and there was a sound of jealousy in his words