Hey, i need your advice

Hey, 2 months ago I posted my break up achuchu here and I’ve been doing well until this week, i kept having dreams where he would date girls like my cousin, random girls, and even my 1st grd classmate, my friends said that i might be thinking abt him but honestly im not, I’ve been really busy lately, but yeah we would send each other memes but only that we never asked each other abt how’s our day been and stuff and its not even everyday but i kept on having dreams abt him and its not fun anymore its really annoying cause now i have mixed feelings for him, i need some advice on how to deal w this cause i cant focus on my school works and its eating me up