you had a crush on Jacob for a long time but he had no liking in you whatsoever. But that was a long time ago, he still thought you liked him so he tried to make you jealous on multiple occasions

He was going out with a girl but was only with her to make you jealous. One day you were talking to a guy and Jacob walked by but he felt a wave of jealousy around him. He then walked up to you to ask a question

“Hey uhm.. I was wondering if you wanted to join me for lunch..” he said nervously