He squishes me

I'm 5'0" and at a healthy weight and my bf is 6'2" 220lbs. He's not fat, although he has put on a little weight since we started dating almost 2 years ago. I love him being on top though I can only handle it for 5 min before I need breathing space. We always end up maneuvering so I'm on top. He's not unhealthy looking but ends up squishing me. How can I go about this?