Comment by Cthulhu_

It doesn't have to be a Big Thing though; the problem is that the word "trauma" sounds / feels very serious, but it can be trivial things, or things you shrugged off like "well those things just happen".

Personal example, I had a good (girl) friend when I was like six, I was very lonely / isolated before she came around and we played together and the like. But then her parents moved and I never saw her again.

And for many years, that was it, it happened, couldn't do anything about it, nothing abnormal about it. But then because of Reasons I ended up going to therapy, and that event (plus others) are probably linked to a fear of abandonment / commitment, of a pessimism when it comes to relationships (as in, don't get too close, it'll end and there's nothing you can do about it).

But also there's a factor of "My 'trauma' isn't that bad because others have had it worse". Doesn't mean you aren't valid either.