Lately I've found that unless I've been interested in someone for a long time, and formed an emotional connection, I have trouble with being in relationships. My first bf (I'm bi and trans btw) and I were in the same grade and I had a crush on him for around 6 months before we started dating, and I had no problems (until he turned about to be a lying asshole, but yk). But since then, every relationship I've had, things will be okay for a bit, then I will get this weird feeling in my gut, like my emotional connection to the person I'm dating is fading. It's happening with my current partner at the moment, and even though I'm head over heels for this person, I can't shake this feeling. I just don't understand it, and I want it to go away. I just want a relationship where I don't feel emotionally detached from my partner. I have some pretty serious ptsd and other stuff going on that I know might have a contribution to this weirdness, but at the same time, I've been considering as to whether or not I might be demisexual, as all of the people I've dated, including my current partner, and I, have had romantic interest in each other for only a month or less before dating. Do I need to give myself time to get past what I'm feeling? Does anyone else have any idea what I'm talking about, or am I batshit crazy?
Help, I'm desperate
Okay, to start this off - I'm not demisexual, so I can't tell you for sure.
Acknowledging that, I still don't have a clear-cut answer for you. Because there isn't one. Whether you are demi or not, I'm not sure if that's entirely related to your feelings fading. It might be related to the PTSD (which can be helped, by the way), or it might just be you loosing interest in people, or them not being right for you. Or, maybe you have to come up with ways to re-strengthen said emotional bond. You could always try to express these feelings with your partner. Maybe they'll be able to help! Just because things have faded doesn't mean they're gone for good. But if you don't think its worth saving, then you don't have too.
But by what you've described, you might be demi. And if you are, great! If you're not, that's okay too. As long as you are comfortable, you can use WHATEVER label(s) you want. If you feel comfortable with demisexual, use demi. If not, don't.
But regardless of ANY of this, at the end of the day, no, you are not going crazy. Questioning your sexuality. romantic orientation, and gender are all perfectly normal things.
As for giving it time, I would give it time, but not to fade, to explore it. There's no time restraint on identifying what exactly it is. You could label it in two minutes, two hours, two days, or two decades. As long as you're happy, that's what matters.