You can still like romance movies and ship people/characters, it doesn't affect your romantic orientation. If you don't feel romantic attraction (meaning this wanting to be in a romantic relationship or to do romantic things with a specific someone) or you feel very little of it, then you're aromantic/arospec (in the aromantic spectrum). Defining yourself as your own soul mate sounds aro for me, as it is a common feeling between the community. Also, the fact that you've only had one relationship in 37 years and that you don't feel the need of getting a partner. I would say that you're aromantic, but you're the only one who can say if that label fits you.