In any situation - he is afraid that that you will reject him.
He is afraid that the little bickerings between you two, some day, will go too far.
He is afraid that you will get kidnapped - because of how precious you are.
And simply the fact the he might lose you.
He is constantly afraid that you might get into some kind of vehicle adcident.
For example, since you travel alot, Joe calls you as soon as the plain lands or right before you're about to go on board. He is afraid that the plain might crash.
He is definitely afraid that you fancy Dan Howell more than him. (Tbh I do #sorrynotsorry)
He is afraid of change, because the current situation seems to be an absolute utopian to him
In summery, he is afraid that you will get hurt, leave him for someone else, and that he might hurt you.
