Plus size sex- why can’t I ride my man?

Alexis

Our sex Life is so good...but at times I want to be able to do some of the work because my man gets tired out easily. I want to ride him but it seems impossible to get his dick inside me and I sweat just trying to hover over him trying to put it in. And mind you he is very big down there and long. Am I too short or have too much fat? 🙁 My boyfriend is 6’1 and I’m 5’7

Any plus size women able to ride their man? I need tips.