He broke up with me because of his childhood trauma coming back into his life. was that a valid reason for us to breakup?

Sounds like he’s full of crap and making bullshit excuses. In any case what we know with certainty is that A) he’s making zero effort, B) he runs away when life gets tough instead of allowing you as his partner to be there to support him, as you should and he should when you need him to support you OR he’s lying and using this whole trauma thing as a bullshit excuse for just not wanting to be with you anymore, in either case = can not be trusted for a longterm/lifelong relationship and definitely not marriage. C) He broke up with you. The relationship is over. So knowing all this it’s esy to determine that you should just move on now. Don’t ever try to force something with someone who leaves you. You can never build something lasting with this man anyway, unless he’s sees a professional psychologist and do extensive therapy and self-improvement work and this would take years and that’s if he really wants to, dedicate everything towards it and finds the right therapist. So it’s a no. Move on.
Sounds to me like he's in an emotional state that excludes being in a relationship at the moment. That goes deeper than what you can handle, most likely. So possibly it is valid in his mind.
Seems to me that if he genuinely wanted you in his life, he would keep communications open. Shutting off as he has sounds suspiciously like he's thinking of keeping the 'fallback' options open while doing whatever it is he is doing in his life.
Were I you, or doing my best impression of my imagined you, I'd take a deep breath, shrug shoulders, open the door, and walk out into a different, hopefully better, relationship.
The bottom line is that you love him dearly and he loves you not and believes you will always be there for him. Sorry to hear this.
Opinion
1Opinion
Sounds like he’s just not interested anymore.
He's done with you.
Superb Opinion