email/sketchy boyfriend question update/other question

so i wrote earlier about the email checking incident. i think i was too hasty in saying they had hung out alone a lot. they hung out alone once but in a group a fair bit. the thing is when we're at home together (which is usually, he was on a 6 month exchange) we are joined at the hip so there aren't opportunities to get close with other girls and i think he was worried i would be jealous. the girl had a long distance boyfriend too. but still, months after he came back i can't shake the idea that there's more to the story, no matter how many times he swears that's it.