If you're depressed, talk to a doctor. Otherwise, I experience this quite often myself. Even at a funeral for a family member of mine, I was having a hard timegrieving I couldn't cry, I just felt numb. Maybe talk to a close friend or a psychologist but unless your depressed and suicidal, I think you're okay.
If you have feelings beyond the normal for your dad or you are just having a "moment"...
yes very normal.
Having feelings is a good thing:)
Presumably happiness, sadness and all the other normal feelings
It means that you are happy and affectionate ( well they are a couple of the feelings)
Feelings can often be complicated. Having feelings for another person isn't necessarily bad, however, acting on those feelings while still with your boyfriend would be considered wrong.
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Disappointment after developing feelings for someone is a normal reaction
It is very normal for a nine year old not to know their sexual preferences and as they mature they discover the direction in which they should go. Stop beating yourself up because it was a normal feeling when you were younger.
Not having pre-ejaulate ("pre-cum") is perfectly normal, having none, a lot or a little are all normal.
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I assume that you mean "How do you stop having feelings for a girl?" I can't answer that as I am not a lesbian, but I can tell you that if you have real feelings for someone then its not easy to stop having feelings for them... You need to try and remove that person from you life as much as possible. You need to move on.