A good indicator of his interest in you and want to spend time with you is if, upon meeting you, he touches you without making any overtly sexual advances.
When he's head over heels for you, he can't keep his hands off of you and his eyes well up with emotion.
When he comes to you, knowing your preferences, he talks to you only on those topics which you like.
It is clearly visible from his words that he is in love and you also start getting lost in his deep and interesting words.
He becomes curious about your plans and offers to accompany you to your favourite spots. He is dedicated to you and talks of your future together while he is talking to you.
He starts offering to introduce you to the most important people in his life, in case you say no, he plans a small event and involves all his closest people to introduce you to them.
He seems to worry about you more than ever; In fact, your well-being soon overtakes all else as his top priority, which you can tell just by looking at his movements.
When he is in love with you, he will find any excuse to spend time with you, he will do anything to be with you.