Discouraged.

So I just complained on here about my Fiance watching porn and making me feel discouraged more often.. To make matters worse ... He's leaving for a business trip in a few minutes and won't come back till tomorrow night. He's left before working for the same guy and it's nothing I ever worried about.. This time is different though...his bosses daughter is picking him up and they are gonna be in the same hotel room too I'm sure. There will be other people but still.. He's not the cheating type but the opportunity is there and I've been cheated on so many times by my ex that this situation just makes me feel uneasy.. Could someone give me words of encouragement or something. She's 32 and her husband is in prison, my Fiance is 22 btw..