If a man is interested in you
Specific signs of a man who is interested in you and if you do not see them, you better look at someone else:
He initiates communication. The more often, the more he likes you: he writes first, calls for no reason.
Tries to be helpful: looking for a way to help, spares no time and effort for you.
Caring. Invites somewhere, wears flowers, gives something. This is the surest sign!
Touches. Well, carefully: hug, giving a coat, give a hand, hold on to the elbow.
If you like him, be open, benevolent, encourage his actions.