Are either of you dating someone else? Are those relationships long-term? If your platonic friend already has a non-platonic friend it might not matter how often you talk or touch. Even if a spark is there, do you want your friend to end a relationship they've been in for a long time? They might have feelings for you that go beyond platonic, but those feelings might not be strong enough to end their current relationship.

If you and your friend aren't in long-term romantic relationships with other people, you should move on to the reality of your sex lives. Are you or the platonic friend sleeping with anyone or a lot of other people? If they are, all of the signs that suggest you might have a not-so-platonic relationship might just mean that one of you likes to flirt or that one of you is more of a touchy-feely person. Sex and love are two different things and you might not want to ruin your platonic friendship for a romantic relationship that might not pan out in the end.

Keeping track of how you touch, use your bodies and present yourself is an easy way to determine what you really want from a relationship and puts you one step closer to knowing if you're more than just friends.