Celebrity is one person and true lovers can be thousands in number. Even if they are in hundreds and they somehow get a chance to express their love for the celebrity, that would become a routine thing for celebrity and celebrity would just put all their "lover-fans" into "lover-fans-category" of their mind and it would become a routine thing for celebrity to come across such people who are too much expressive fans. Can't blame it on celebrities as well because they are also humans and they reserve every right to live the way they want. You love someone; even if you truly love someone doesn't give you a license to just impose it on somebody. The essence of love is to see the lover happy and care for him/her as the spelling of love are "R. E. S. P. E. C. T". Lucky are those people who have found someone equally loving.
by the way, I am in serious love with one celebrity. Initially, I thought that it would go away but it didn't. So what I do is look her up in the news and interviews, see a smile on her face, make sure she's happy and be happy myself. I think that's the way to go.