I think I'm f***ked up

Think about Bill Gates in his bath robe. He also has a hot gold-digging wife named Melinda. She is nice though.

So maybe you should get some better porn.
Like: Farm Girls on the Loose. Awesome!

Don't know what to tell you man. Maybe try taking a break from the masturbation. Try taking a week or even a month and see if that helps. Or, it could just mean that you need to get yourself a girl.

Sounds like you are either mastubating too frequently and need to cut back and/or you need the real thing. If you desire female companionship/intimacy and are not getting it, such a scenario may leave one feeling empty, unsatisfied and unfulfilled. Besides cutting back on masturbating, try not ejaculating for 2-3 days at a time. It will initially make you feel anxious when you don't get the release, but the non-release of fluids will help to keep your arousal levels high throughout the day and night. Get a girlfriend coupled with my method of masturbation and these two things will more than likely resolve this issue. These techniques are sisophous approved.

I'M NOT TRYING TO BE INSULTING !!!
But have you thought of the possibility that you might be homosexual?
Or maybe you're just bored... happened to me.
I've been into porn since I was a little guy and also got a bit bored with the whole guy & girl scenes. Try mixing it up a little... there is TONS of porn out there from traditional to lesbians to farm animals... just look around and find out what floats your boat.

yup totally normal. I guess it gets boring after a while