i don’t know what to do

i feel so alone. so empty. i try to be happy but i’m afraid to be because i know something or mostly someone will make me feel like shit again. and i’m so tired of it and everything, being left out, never the first choice, just being ignored. i never feel like i’m enough. i’ve been so suicidal recently and i don’t know what to do. i don’t talk to my friends about this. i always help everyone with their mental health or any problems they have. i just don’t know if i can go on anymore. it’s all to much. i need advice or anything please.