Alejandro watch you talking with other members of Los Vaqueros and gets jealous as you laugh with them and not with him. He wants to be alone with you, wants to make you happy, wants to make you laugh like that. He is obsessed with you and jealous of the others talking to you. He watches you silently and give the other members a death stare. He hated that you are with others and not with him. He deserve attention, not them.