I'm sorry that you experienced that. I can only imagine that he broke up with you and allowed you to feel this pain, to save you from a further, deeper pain later. This is how I rationalize breaking up with someone, even when it seems good on the surface. If there's anything that is truly unsatisfying, and I know in my heart and head I can't get past it, then I let that person go. To me, this is better than the alternative, even though you don't see the logic in it. That is logical to me. It is not logical to me, however, to let just the emotion of "love" rule me.
This is often what scares me about F types - I don't believe they are capable of taking their commitments seriously. It seems as if they just run around looking for their next "fix" of emotions, leading me to believe that they would just leave me in a moment's notice if they found "love" with someone else. It's an addiction to a feeling, but it ignores responsibility and practicality. Of course, these are all assumptions and stereotypes, but I've seen it happen so many times when my friends find a new "soulmate" and agonize to me about if they should leave their current spouse or not. As harsh as it is to say, it's what I truly feel: I think people like that have a weak character and they disgust me. Ouch, I know. But all I can give is my honesty. I know this does not apply to every case and there are many reasons why relationships fail, but fickleness of the heart is one thing I cannot stand.
I don't know this person and can't say for sure what he was thinking. I just wanted for you to be able to see into my mind, because that may help you find some closure with this whole thing.
I recently ended a decade long back and forth tug-of-war with someone. He just didn't understand why I couldn't commit to him if I loved him as much as I did. And I do love him. But I just didn't think he was a viable candidate for my long term happiness. Happiness for me is emotional stability and common interests/goals (maybe that's why the future talk threw you off? I do that also, but more to probe about viability, not to suggest that it will come to fruition...) Emotional stability seems impossible with someone who generates intensity in me. It's unsettling. To know that everyday I walk through the door, I won't know what to expect. My life is so chaotic and random, my home life needs to be stable and comforting and reassuring - not a rollercoaster.
I never take my commitments lightly, which is why I rarely make them.
Again, don't know if any of this applies to him, but hopefully you can pick through this and find some use for it somewhere down the line....