Let a girl atleast try to be prudish here.
A smile.... I get all the time. From people on the street, in the shop, from students, co-workers. It is nothing to do with being sexual attractive. It has to be with being open mindend and friendly towards people. The few times I have had men lust after me..... it has happened once or twice for some strange reason. It has been great and the attention was addictive. But it was superficial. I felt, atleast with one, that I was just my behind and nothing else. And above all. It is not a Christian thing to look for or to aim for in interaction with the opposite sex.
That said. I do like you, Tommy. And for me it doesn't matter that you don't feel sexual attractive. Because that is just such a minor part of who you are. Be Tommy 100% and content with that. Does that lead to a wonderful wife and a perfect suburbian life? Who knows. But atleast you are geniuine. And you in yourself are more than enough. To any woman.