When you like someone, there are no rules or boundaries. It is like an air or water stream flowing and choosing its course. There are no cookbooks or best practices.
With time the meaning of likeness and love has also changed. We have started attaching with others on their external attributes, not who they are internal.
While in the short-run, it helps both parties, when the long-term commitment comes to play, like or love gets messy.
You have to like or love someone for who they are not, what they own or can become in the future. Looks, money, and fame are temporary.