There's this guy that I have had a crush on for a few years now. We have each other's numbers. I will text him and he never responds to any of my messages. I send him pics of myself just to see if he might reply. I don't bother him. I don't text him every single day because I don't want to be too pushy and get on his nerves. So since I text him sometimes and he knows what I look like but he never responds, does it mean that he's just not interested in me, like maybe does he just not find me attractive?