recommendations??

so my bf and i have been together for almost 2 years. we’ve already had sex and you could say we’re pretty active! he cums all the time but i haven’t been able to (never experienced it). i feel bad bc my bf always tries really hard to help me and when he does go down on me it gets super intense super fast and i feel like i’m restraining myself but then i try to calm down and it doesn’t work!! how does an orgasm even feel like?? i know itslike supposed to be an amazing feeling and sex is already good but i just wanna experience it.

i’ve also masterbated before but i still cant seem to orgasm and i’ve tried many times but i just get tired out! it also starts to feel intense when i do but i back out bc i’m scared