OP, I’m ten years younger than you, so I can relate though not fully appreciate completely what you’re going through. Sometimes I’ve also thought that I may have “missed” my true vocation back in my early twenties when I wanted to be a Carmelite but was too afraid and embarrassed to tell the priest about it- then I soon developed a huge, huge crush on some guy and forgot all about religious life

.
I’m sure that looks aren’t your problem as some have suggested. I know of a few attractive persons who have married very late in life-sometimes things just happen that way.

If it was all about physical attraction,I doubt there would be any single people past the early twenties.
Even secular social scientists will tell you that physical attraction is only a very small part that is important mainly at the beginning, as a selection for many biologically suitable mates (To you, they just appear “attractive”). Then it becomes a very chemical thing (infatuation) or the experience of “falling in love” that is meant to narrow down the attention to just one among the many biologically suitable mates. Something extra beyond the physical, about some particular individual just stands out or clicks and your focus rests on them. The narrow focus, biologically speaking, is supposed to ensure that you mate up with that person more exclusively than the kind of friendships based on pure physical attractiveness alone. But it’s not enough.
If things go well, attachment follows, with the infatuation subsiding to lower levels. The attachment is about permanence- the stuff of which marriages and long term commitments are made, as it consist in loving the real individual with all their good qualities and flaws. The falling in love experience which is only between a few months to a few years period, is meant to allow the two people to become very close and to know each other (expose themselves) and to allow the attachment to foster.They say that falling in love makes “risk-taking” with another person tons more likely. The scientists say that the attachment exists for the rearing of children which requires great levels of sacrifice and co-operation. It is here that if you have real incompatibilities with regards to core value systems, character and how to rear children etc, that things can go very wrong, very quickly.
My point is that even if we exclude the spiritual and intellectual aspects of man (and true love) those who think merely in terms of physical attraction are thinking at a very shallow level. I think teenagers date this way more than any other group. And more mature adults place the least emphasis on this aspect in comparison with the younger groups.
I hope you find the person that is not only attractive to you, but with whom you share chemistry and can fall in love with and with whom you are truly compatible at a deeper and more core level, so that you can get a happy, permanent and committed marriage.Only God knows who and where that person is. But ask St. Joseph, too. I here he’s great in that department (as in many others

).