tips on how to have an orgasm..

I need help 😭 I just got in a new relationship with a guy that I really care about & the sex is good but the only issue is me getting there. He always gets his but I never do. I’ve had 4 sexual partners since I started having sex but none of them have been able to make me cum neither so I’m starting to think that something is going on with me.. any tips on how to have an orgasm?