Okay so I am love with a guy who was my youth pastor his name is dane and I really love him but he just got married should I tell him how I feel or should I just let him go and am I sick and wrong for liking him I am fifteen

Keep your feelings to yourself and focus on other things. No good can come of telling a youth pastor that is married your feelings. Married couples often tell each other everything too.
At the very least, you could end up feeling embarrassed.

You should definitely NOT tell him how you feel. Crushes come and
Go in early adolescence, and, in most cases, it's best to keep them to
Yourself.

A recently married man who is a decent man would not want to know
That a young girl has these feelings about him. He has just entered into
A committed relationship that should be the focus of all of his romantic
Interests. It is a very bad idea to try to come between a man and
His wife, even if you were an adult woman. Try to think how you would
Feel if you were recently married to a man, and had to feel in the least
Bit threatened by outside influences from other girls/women.

Life is full of things that we want and cannot have. Coming to terms with
That and trying to do what is the right thing will make you feel good about
Yourself.