trying for the 2nd time

bl manhwa where ml and mc were rivals(??) in high school (maybe not but they were classmates) but in present time theyre in college and the ml meets the mc again (in a fast food restautant) he keeps talking to mc and acts all possessive making us think hes been in love with the mc the whole time, but we get the mls perspective and he actually lost interest in mc. Basically the ml approached the mc because he used to be in love with him in high school, but now that they met again the mc ruined his expectations and now he finds him boring
One of the lines he says are like: wishing his fantasies of meeting his first love again just stayed a fantasy.
After realizing that point, the ml continues to follow the mc just for the sakes of it???
I think one of the leads are blonde/light hair colour and the mc is very nice and innocent which contribues the ml thinking hes "boring/disappointing"