Conversely, if they are engaged when talking with you, and maintaining good eye contact, then they may be happy to have a conversation, particular if other body parts and their smile are engaged.
If one eye brow is raised and the other not, this may be sign of confusion or disagreement. Consider asking if there is something confusing about what was said. But beware, you don’t want to just start another argument with your ex, so it’s best to not force anything.
If your ex’s arms appear relaxed, and not stiff, this is a good sign. When their shoulder and arm muscles appear less tense, your ex may see you as a calming presence, rather than as a source of stress.
If they are pulling back, it’s the opposite effect. They have disengaged with what you’re saying, and are trying to create physical (and emotional) distance. This is a sign to back off, and perhaps talk another time.
Be aware that sometimes hair touching is just a nervous habit, that may be nothing to do with you, and is a subconscious way to relieve stress.
If your ex’s feet appear uneasy, your ex is likely uneasy. Don’t force your ex into a conversation, but if there is a way to relieve anxiety and awkwardness by talking about something you both enjoy, feel free to try. See if he or she calms down; otherwise, possibly talk another time. Conversely, if your ex appears to want touch you feet with their feet, this is a strong sign of attraction, and they are eager to be with you. Think clearly about if this is what you want too.
If their feet are planted strong and solid, they may be showing, or trying to show, confidence.