You'll forget all about any silly height difference because, hello, intimacy! And you can just slide your shawty frame as far down as you need to make your genitals kiss.
Do It: Near the edge of a bed or bench, rest on the hip and forearm of one side and press your thighs together.
Cuddle up like you are spooning and let him ease up in you? Do It: Lie on your stomach, maybe with a pillow under your pelvis, and lift your hips into the air.
When you are horizontal and your partner is standing, the only height that matters is that of the bed or whatever surface you're sexing on.