orgasm

help!!! me and my boyfriend have been together for almost 2 months and we have sex every time we see each other like more than once. i have never finished tho :((( anyone have any tips or tricks that i can try so i can orgasm?? (i've never finished before, with anyone)

edit: i can't tell him what i want cause i'm kinda new at this and don't really know what works/what to do