Can’t orgasm

So my boyfriend and I haven’t been together that long, maybe about a month officially, but we have been having sex, and it’s AMAZING!! The issue is that the couple other guys I’ve had sex with I haven’t been able to orgasm with and I thought it must just be because they definitely had smaller dicks but my current boyfriend is HUGE!! And I still can’t orgasm!! I can orgasm on my own but only with a vibrator never my fingers. My exes didn’t mind if I used a vibrator but my boyfriend doesn’t want me to he wants to figure it out lol. Help me figure out some ways to move the process along because I really might think I love him and want this to last !! And I love having sex with him too ((;