Starry, this is a tough one. One the one hand, I see how you may need to be true to your own feelings and desires, and if your desire is to not call him back, you would want to honor that within yourself. On the other hand, I think not calling him back at all and leaving him hanging with no closure or answers can be cruel to another person. It is a blow off, and that is really hurtful to the other person. You reached out to him in this case to be friends.... in that sense, maybe you owe it to him to be upfront? You could always say that you feel he is more interested and now you feel awkward about being friends and that it's best if you're not anymore? That way, he has an answer, and it won't be as awkward when you do run into him.