First of all, see if there is anything in his hand that can express his deep love better than this. If there is, and he didn't give it to you, it may be that he has a certain affection for you, but not so strong. If not, congratulations, he must have a crush on you. Of course, this can't be so arbitrary and subjective. Still have to look at his heart, beat about the bush. Facts are the best verification tool.