Is this love or attraction

he will stay in front of my friends house from 5 year i am friend of her he is her childhood friend .. past 2 years he use to do too much like he use to tease us but from past 1 year he behavior has changed..i stopped visiting her house 4to6 months back and one day she asked him what happen why are you sad he sad my girlfriend is missing... she laughed at him ....and one of his friend asked her why your friends are not coming ....they are not coming na so he is dull and sad now a days he said ....may i know the reason what is wrong with him and i never talked with him nor smiled but we use to crack jokes at him but behind his back ..... can u say any advice my friend say he loving me but i am able to believe ?