Ok. Where to start?

1. You seriously thought a girl you broke up with 6 years ago was just going to fuck right off the bat? I don't know the dynamics of the relationship, the break up, etc, but if at the time she had any resentment over the break up then this is peak delusion.

2. Women sense desperation. Seriously. They smell it. She may well not have responded because she thought it might be nice to catch up and then got wind of the fact all you wanted to do was bareback her. That's insulting to her. She saw through the whole thing, and rather than making her feel like she was special to you, hence the desire to catch up, you may have made her feel like all she was to you was a fuck.

3. You read up on it? Please tell me not one of those "PUA, HOW TO BE A BRODAWG PLAYA" bullshit sites. Again, don't know the dynamics of the situation, but I'd say about 2/10 girls MAXIMUM would go for that, the other 80% would just shake their head and walk away, as it would appear she has done.

Look, I'm not big on going back to past partners, I'm on record as saying it's the sexual equivalent of eating out of the bin. Most times I'll make sure I punted beforehand so any sexual tension is non-existent, which funnily enough will make the woman you're meeting FAR more comfortable, and ironically, more likely to be receptive. Like I said, women sense desperation.

So to your question, how do you stop being emotional?

Like Johny has said above, it sounds like you crave intimacy. Trips to hometowns, or places with significant meaning to you, can be quite emotionally confusing. Last time I was in Japan I met up with 2 exs for the first time in 10 years. One was a nice breezy dinner with some laughs etc, the other ended with the girl crying in the train station shouting at me for, firstly, breaking her heart 10 years before, and secondly, for making her relive those feelings all over again. That one made me feel shit, and she was right, I shouldn't have contacted her. So the next day I made sure to go out and have an awesome day sightseeing, and that night I went to a few bars, met all sorts of people, and ended the night in the arms of a cute Japanese girl.

So enjoy your trip, stop overthinking it, rather than looking back to the past, move forward, go out and make new memories, meet new people, don't waste the trip.