I kind of need some guy advice here?

Ok so me and my BF are close and everytime we make out it gets all in teast to da point where we almost undress each other. I told him I wanted 2 have sex with him and his reaction was :^O then :^D HELL YEAH but everytime we are ab to do it or almost do it SOMEONE HAS 2 BE A COCKBLOCK AND F**K IT UP. We both laugh at it but were mad as hell on da inside. Wat should we do?