Sure by eyes because eyes are the best language in love and the best way to deliver love. But not only by eyes but also by knowing and observing how he deals with you . That if deals with you in kind, tender, polite, and lovely manners and miss you a lot and feels longing towards you ..... so he loves you. But if he deals with you simply as anyone else so he doesn't love you. But take care that there is a difference between love and admiration.

He will treasure and cherish you ,and he will care you quite a lot .The most important is that he is always there waiting for you ! When we are old ,we will understand what is the love is ,and at that time ,we will know we care us the most . best wishes for evryone ,here !~

If the guy is smart, he will reciprocate the attention you give him. He will usually (but not always if he is just friendly) give you more attention then others or speak of you often. Scientifically, they say a person's eyes widen when they look at a person they like.

By eyes, look in her soul.

by his manner to me, the way he talks, n his eyes ..looking through the eyes of love..........