As a Lady:
You'll always want to be around him. You'll barely live a moment without thinking about him.

You will get seriously jealous when you see him around other ladies out there.

You will feel safe around him and when he's not around, you'd probably miss his voice, his face, the way he talks, smiles, laughs and so on...

You might even begin to fantasize being in a relationship with him in your head: by extension, you'd start having dreams about him.

His pains will gradually become yours and his...