How do you make reaching that big O easier during sex?

Katherine • Just your average 21 year old trying to sift my way through hormones and what to eat. 🍕😎
I feel like with any partner I have had, I have never been able to reach my orgasm during sex. My so and I like to have sex A LOT. Far more than I've ever been used to during a relationship. So when I can't seem to get off while we're doing the deed, it's very frustrating to him because he doesn't feel like he is doing a good job.  It also makes it a little more difficult for me to enjoy having sex. If you have any suggestions, or helpful advice feel free to share!