BA, it is nonsense that non-married people of opposit gender cannot stay together "overnight".. thousands and thousands people come to visit Qatar, and lot of them stay at their friends' places.. nothing "illegal" here! you are not going to maintain "common in law" relationship in Qatar. You are a Visitor! you are his friend!
we pretty often have some guests in our place "overnight".. so what? is that a crime? people in whole world are socializing, visiting each other's countries.. it is great!
and PM, pleeeaaase, stop being so much suspicious and stop investigating the case: "why didn't you say that and why did you say this? and what IF he wanted sex?" , ...so what if he even would want sex? actually he better would...this is a normal instinct, means he is healthy straight guy...
someone here said: "if got caught while having sex...".. how the hell is THAT possible, unless you do it in City Centre or on the Corniche in front of everyone's eyes...
what a people!! like they are jealous or what?
BA,nothing wrong with visiting qatar, it is a beautiful country! and you are more than welcome here!!
Stay at the Hotel, go out with him as much as you want, get knowing each other...just maintain a reasonable level of safety...don't go crazy over it, he is not gonna kill you, for sure not!!

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"What lies behind us and what lies before us are small compared to what lies within us."
Oliver Wendell Holmes