old bullying back to the present

hi i am a 22years old guy.

when i was 17yo in high school i had some problems with a classmate , he was calling "gay" and insulting me with bad words , that time i didn't know what to do also i was so religious that i can't insulting him back and i didn't want to make troubles in school.

A day i was alone next to the stairs and he came with his best friend and a girl (they both were classemates too), then he told the girl to make me smell something from her hand but she didn't want first time (i had a good relation with her) he told her the second time and she put her hand so close to my nose but i don't remember if i smell or not because i was anxious.

in that time i thought he wanted me to smell a female's perfum to test me if i am a gay or not.also i didn't tell my family or anyone about all this.

Just a month ago i had seen his best friend in my way home , and i was shocked because he was coming my way then when he noticed me he stopped and turned the other side to not show his face (like if he was afraid that i will notice him but anyways i did).

now i am so obssesed about what they did make me smell that day ,and if it was something bad or not.

I don't know what should i do , and if i need to revenge on them or it's not that big deal and i just need to forget it all ?

Please help, i need advices.