A comparison -
Bevin and Andy, from the pool dip, under the water kiss, tipsy couch scene in Tahoe, these two were all about the physical. They have an incredible chemistry, it's clear.
Tessa and Andy - I see these two as having big, goofy crushes on each other. They do a ton of physical play, Andy on the back of the skis, wrestling in the snow in DC. This is courtship 101, what we do when we 'like' someone, it's all about smiles, teases, big hugs, playfulness.
The body language is there for both of these couples.