He finishes too fast and I’m frustrated

I’ve been with my boyfriend for a year and half. So we’ve had lots of sex. And I really love him. But I’m tired of how fast he finishes. I get 2 minutes at most. Normally we will go, he’ll finish, we will clean up, and go again. And this repeats until about the third time when I’m so tired and frustrated from stopping and going so we just stop. It feels really good and he knows what to do in bed. I’m just tired of getting close then losing it. I just don’t know what to do. I have not had one orgasm during sex because of how fast he finishes. And I’ve gotten close but just not there. And I am someone who usually orgasms during vaginal sex not just oral. Any advice or tips pleaseeee?