That's exactly how I am. If a girl is on my mind, she's on 90% of my mind. It's hard to get her off and she starts affecting every thought. Best example was when I was checking this girl out at my store the other evening. I noticed her before she came to the counter, and she wasn't THAT attractive, but enough to catch my attention. She asked me a question about a sale, and her mother was at the counter, too. I could barely make it through the answer. Her mother kept noticing that I was completely failing at answering her and bagging something at the same time.
I'm getting better at it though. Usually, I just have to pick a flaw, and focus on it. It'll turn me off of her so I can focus. Shallow, yeah, but that's how my mind works.
We're cold and critical to anyone who hasn't gained our respect yet. But, once you gain my respect, and if you can do it, gain my admiration, I'll be a puddle around you. From the time I meet someone until the time I've found a reason to respect them as a person, every second I'm with them is judgment mode. I'm watching your every action to find fault with it. I think about what you're doing. What's motivating you to do what you're doing? What are you going to gain from doing it? Is there something else you're not doing to do that?
Everyone in my life, I compartmentalize my opinion of them. I'd have to say it's like a filing system of opinions. Why are you who you are? What do I like about you? What do I not like? Do you have some incessant habit that grates on my nerves? I will remember everything. People find my memory creepy, though. That hurts my feelings. Really, it does.