They often enquire about you and your life past a surface level degree and will usually divulge personal hobbies, likes, values, etc about themseleves. They might smile often and laugh a little too loud at every joke you make 🤣 if you’re ever unsure, you can always ask! Effective, honest, open and clear communication is fundamental and often lacks in the majority of relationships, romantic or platonic. Hope this helped a bit!

I’d say better ask them if you are unsure. That is the most obvious way to understand.

Eye contact for sure and body language. The eyes do not lie from a friendly glance to I’m into you. Usually paired with a smile that can’t be helped.

You could smack me with your cock and I’d still be unsure