Two double cheeseburgers, a Big Mac, a McChicken sandwich, and large fries in the car — were we on an awesome date or just hanging out? The beauty of having a boyfriend for a best friend is that it was both. When the two become seamless, you know you have it good. My partner is also my favorite companion, which means we can go to a bar and get hammered together, and then proceed to our romantic dinner reservation straight after. It's the best of both worlds. Here are 20 amazing benefits to having an SO for a BFF.