Ugh! Any answers?!He's pretty confusing, guys plz help probably ya'll have the answer.?

Okeii well it was at my bday party &he wz my escort for tat day. During rehersals we would flirt well thats what i thought. For sure i would cuz i really liked him & still do. He would always be squeezing my fingers when we had to hold hands &would start twirling me around at rare times.lol So the day of my party everybdy was saying bai & stuff &then his mom comes personally to tel me bai &that she had a great time(she was such a sweetheart).By the time i turn around hes already heading to the door. So im wondering why didnt he say goodbye to me:'( &if he wz intersting in me? Oh the shift is that he was related to my sisnlaw &well my brother is super overprotected &well he knew my family &i knew his mom(he doesnt have a dad)....do you think that was part of him not showing interest in me? Or am i just having to much hope in him that he did like me?