I'm not an emotionally strong person but this might motivate others to work on their 'mental game'.

I was playing an online $10 buy-in MTT with ~400 players. Late in the tournament I was 15th of 60 players remaining.

Then I had Kings but, unfortunately, my gf called with some stupid question. So I timed-out on the play while talking to her. I replayed the hand and two bigger stacks went all-in preflop. The winner had AJ on a J9563 board so I missed out on a triple-up because of the phone call.

I basically 'lost it' at that point and started spewing chips, shoving on 3 of the next 6 hands, and busted out at 57th place.

I'm not upset at my gf for her call. I'm upset at myself that I lost control. Maybe my example will encourage others to keep calm under similar circumstances.

But for me, I guess it's just a personality trait. Psychologists: is there's a solution?

Maybe the trick is to forget all history of a game ..'live in the moment' like Buddhists practise.

Dude, play poker and go mgtow. Just look at this how a chick can affect your mental state easily. You have been manipulated.

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You answered your question pretty well with 'control' and 'forget all history'.
The emotionality post-KK probably affecting your judgement/balance. After giant/stressful cash game hands I'll freewheel for a while til I'm calm again.

Solution? Play on PokerStars, the flop always come A high.

Switch your phone off when you play poker. EZ game.

I suppose pic of gf is out of the question?

Put your phone on silent when your playing poker.