I feel a strange attraction for someone.
You can't help who you're attracted to. What about the attraction is strange to you?
I'm not normally attracted to that type.
Even if you are not normally attracted to a certain type of person, it is not uncommon to feel attraction for someone new and different. Everyone finds different types attractive and it's good to branch out and be with someone different sometimes.
Still feels wrong.
As long as your attraction isn't to someone who is underage, there's nothing wrong with what you're feeling. As people get older, their preferences change. It's normal to be attracted to someone who you may not have previously been interested in.