To: I was to meet him in person for the first time and run up to hug him after gets out of an airport
Me: If you have feelings as strong as that for him, why not show them.
Nothing is nicer than having someone you are with, showing that sort of appreciation and one of you, either you, or him, eventually has to push your potential relationship up to the next level, so why not you?
How long you have known each other, has nothing to do with anything.
We are emotional animals and what better way of greeting, after you have been apart for any length of time?
R