My suggestion... if you liked that level of intensity? Take a step back, look at what she did that created/fostered that situation, and then bring that with you into your next relationships.
I don’t exactly understand it, because it’s my normal. It’s how I interact & relate with people. It’s the normal of a lot of people in various subgroups, not just trauma, but eat, drink, be merry... for tomorrow we may die certainly shapes a lot of people’s worlds.
Live every day as if it’s your last -and other BS motivational slogans- simply isn’t sustainable long term. If today was your actual last day on earth, and you knew it? You could drain your bank account without a second thought. Not go into work, grab the people you love best, and head to New Zealand. Or a thousand other things. Because there is no future. There’s just NOW. People with PTSD often have to fight against that reality, take what they know intellectually (tomorrow will probably happen) and force themselves to continue to act as if. To send the kids to school, go into work, pick up dry cleaning, make plans for next Tuesday, pay the rent, sit through nonsense meetings. But the importance of NOW, right here right now, tends to leak out in myriad ways. One of which is a certain kind of rule breaking, of joïe de vivre; saying more (because it may well be your last chance), doing more (because it may well be your last chance), feeling more (because it may well be your last chance), etc.
Full throttle living -which is exhausting- being the norm, and paced routine being the hard fight (which is even more exhausting). Like constantly attempting to rein in a horse that just wants to RUN, may mean that you’re going the same speed as the horse and rider who is placidly walking beside you, but you don’t actually LOOK the same. Nor does it feel the same. And there will be periodic flourishes, as that energy leaks out; the horse sidles one way, dances another, ripples their body, tosses their head, prances a few paces, flicks their ears (all in a GO! Go NOW!)... tightly coiled energy, leaking out in small ways. Even reined in as completely as possible.
Of course, the flip side of that coin is not only are fun things amplified, but also fights/problems... and the consequences that follow (utter exhaustion, and unwillingness to face that exhaustion meaning unwillingness to interact with the parts of the world that inspire it, emotional overload and unwillingness to be in situations that demand it, 2nd guessing and over analyzing how much control is too much / not enough, ), whether you fight yourself all day long or are given your head and run free. So one ends up with an INTENSE! -rest- INTENSE! -rest- (avoid avoid avoid can’t handle the intensity or the exhaustion) INTENSE! -rest- Instead of a far more steady pace, with less commitment...meaning that there’s not only enough energy for today, but tomorrow, and the next.
But just like people whose neutral/knee-jerk/baseline is intense/full-throttle/5th gear all the way can learn apply some steady pacing, and acting as if (there is a tomorrow, and next week, and now isn’t the only thing that’s real) to their lives? I’ve watched plenty of people whose neutral/knee-jerk/baseline is slow & steady learn to dive more into life. Say more, do more, feel deeper.
Essentially? Both ends reaching towards the middle.
Take the parts that you like, and add them more and more into your life... until it’s habit, if not instinct.