My dad just died and people are saying that i need to get over it..these ppl are the kids at skool hu tease me?

there are these kids who used to tease me 24/7. i have rly good comebacks i used to use but when they never gave up, i just quit responding. when my dad died in a car accident four weeks ago, the teasing slowed. but now they're acting lik i should just accept hez gone and they make funn of me 4 looking sad!!!! LOOKING SAD!!! COME ON!!! i wanted to tell my mom but shez got enuff to deal with...now i rly want revenge against these monsters...wut should i do!!!!???? PLEASE HELP ME!!!