Love and Sex Difference
There is no biological reason for anyone to be sexually interested in me.
I just have to have faith that some other thing may work, or that I can be content to be continent.
On the other hand, the factors than maintain relationships past the time needed for basic breeding are not so biological, and have more to do with being a nice human positively interested in ones partner.
So I can choose to be a little more inclined to see nice things about people, instead of looking for the sign that they would not be interested in me.
Love conquers all.