Short Girl, Tall Guy Sex?!?

So i'm 5'2 and super petite. My boyfriend is 6'2 and super big and stocky. What are some good sex positions for us? We've done it a hundred times with me riding him, and it just gets old. So does missionary because my face is in his stomach the whole time, making kissing impossible. We've also done doggy style as well as me laying on the bed and him standing. Is there any other good positions to spice things up? Also, any good ways for us to have sex in a car? I have a tiny 2 door car so it's a little hard. We've tried missionary in the back, and him sitting in the front seat and me riding him. Just looking for any other good tips and positions you guys might have. :)