Quality time, physical touch, listening and supporting them emotionally, being there for them, and making them delicious treats—sorry, I can't choose one, but just being a positive presence in their lives.
All of the above, with physical touch a little higher, if we're talking about erotic love. If it's love as a general term then words are important, as it's a more distant way to touch each other..
I'm a fondler 😂 Touching and being touched is very intimate. Of course I'm not out there grabbiing and touching people who don't want it like some pervy groper... but those I am friendly and close with know Im a cuddler and a hugger. I only grope people close to me lol. Food is my 2nd language